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1.
Herz ; 39(5): 605-18, 2014 Aug.
Article in German | MEDLINE | ID: mdl-25006077

ABSTRACT

All women of child-bearing age suffering from congenital cardiac valve malformations or acquired valvular disease, pulmonary hypertension or arterial hypertension and who are at risk for coronary heart disease should receive early counseling and optimal treatment before pregnancy. They should be treated by an interdisciplinary team composed of gynecologists, cardiologists, geneticists and, if necessary, cardiac surgeons. This interdisciplinary approach should be used for all pregnant women with cardiac disease in order to minimize maternal and fetal mortality. As physicians will only rarely be confronted with such critically ill patients, guidelines and access to worldwide information from databanks are particularly important (http://www.safetus.com und http://www.emryotox.de).


Subject(s)
Pregnancy Complications, Cardiovascular/diagnosis , Cooperative Behavior , Coronary Disease/diagnosis , Female , Guideline Adherence , Heart Defects, Congenital/diagnosis , Heart Valves/abnormalities , Humans , Hypertension/diagnosis , Hypertension, Pulmonary/diagnosis , Infant, Newborn , Interdisciplinary Communication , Pregnancy , Pregnancy, High-Risk , Risk Factors
3.
Dtsch Med Wochenschr ; 132(46): 2430-5, 2007 Nov.
Article in German | MEDLINE | ID: mdl-17987549

ABSTRACT

BACKGROUND: The objective of the Snapshot Hypertension Registry (SHR) was to assess the quality of antihypertensive drug treatment in hypertensive patients seen by cardiologists on three consecutive days in December 2005. METHODS: Full data sets were obtained for 7302 patients (89.9% of total returned) seen by 268 cardiologists. Mean age of hypertensive patients was 65.4 +/- 11.2 years, 62 % were male, and 93 % were referred to the cardiologist by a general practitioner. RESULTS: Judging from their casual ("snapshot") blood pressure, 35.3 % were well treated (< 140/90 mm Hg). According to the 24-hour ambulatory blood pressure even a lower rate of hypertensive patients, namely 27.6 %, had their blood pressure well controlled (< 130/80 mm Hg). Of all patients, 24 % were on monotherapy. Only 33.7 % of the patients on monotherapy were normotensive. Of all patients on a combination of drugs 36.9 % were normotensive according to the casual blood pressure measurements. Private patients were prescribed angiotensin receptor blockers more frequently than patients who only had statutory health insurance. CONCLUSIONS: The Snapshot Registry analysis revealed that the casual blood pressure in the majority of hypertensive patients who were reviewing antihypertensive medication was not in the normotensive range. In addition, our data demonstrate that evidence-based antihypertensive medication was often not adequately used in Germany.


Subject(s)
Antihypertensive Agents/therapeutic use , Hypertension/etiology , Registries , Aged , Angiotensin II Type 1 Receptor Blockers/therapeutic use , Blood Pressure/drug effects , Blood Pressure Monitors , Cardiology/statistics & numerical data , Comorbidity , Drug Therapy, Combination , Drug Utilization/statistics & numerical data , Female , Germany , Humans , Hypertension/epidemiology , Male , Middle Aged , National Health Programs/statistics & numerical data , Outcome Assessment, Health Care , Quality Assurance, Health Care , Referral and Consultation/statistics & numerical data , Sex Factors , Treatment Outcome
4.
Clin Res Cardiol ; 95(8): 405-12, 2006 Aug.
Article in English | MEDLINE | ID: mdl-16799879

ABSTRACT

AIMS: The DETECT study was performed to obtain representative data about the frequency, distribution, and treatment of patients with coronary artery disease (CAD) in the primary care setting in Germany. METHODS AND RESULTS: The DETECT study was a cross-sectional clinical- epidemiological survey of a nationally representative sample of 3795 primary care offices and 55,518 patients. Overall, 12.4% of patients were diagnosed with CAD. Stable angina pectoris and myocardial infarction were the most frequent (4.2%) subgroups, followed by status post (s/p) percutaneous coronary interventions (PCI, 3.0%) and s/p coronary bypass surgery (2.2%). Patients with CAD were prescribed AT1 receptor antagonists (in 19.4% of cases), beta blockers (57.2%), ACE inhibitors (49.9%), antiplatelet agents (52.7%), statins (43.0%), and long-term nitrates (24.5%). When comparing all CAD patients with social health care insurance to those who had private insurance, private patients had significantly higher rates of revascularisation procedures and use of preventive medications. CONCLUSION: Great potential remains for improving secondary prevention in primary care in Germany to reduce the risk of further coronary or vascular events, especially in patients with social health care insurance.


Subject(s)
Cardiovascular Agents/therapeutic use , Coronary Disease/epidemiology , Myocardial Revascularization/statistics & numerical data , Outcome Assessment, Health Care/methods , Physicians, Family , Adolescent , Adult , Aged , Coronary Disease/prevention & control , Cross-Sectional Studies , Female , Follow-Up Studies , Germany/epidemiology , Humans , Male , Middle Aged , Prevalence , Prospective Studies
5.
Pharmazie ; 61(3): 218-22, 2006 Mar.
Article in English | MEDLINE | ID: mdl-16599263

ABSTRACT

BACKGROUND: Both, cardiac and skeletal muscle creatine levels are depressed in patients with congestive heart failure (CHF). Oral supplementation of creatine (Cr) could increase physical performance in healthy volunteers. We therefore hypothesized that oral creatine supplementation improves skeletal muscle strength, quality of live and symptom-limited performance in patients with CHF. METHODS: In a double-blind, placebo-controlled and crossover-designed study, 20 patients suffering from congestive heart failure more than 6 months and a peak oxygen uptake (peak VO2) below 20 ml/min/kg received 4 x 5 g Cr daily vs. placebo for 6 weeks and were crossed over for the following 6 weeks. Peak VO2, VO2 at the anaerobic threshold (VO2AT), ejection fraction (EF), distance in 6-minute-walk-test (6 min W), and muscle strength (Modified Sphygmomanometer (MS)) were determined at baseline, after 6, and after 12 weeks. Dyspnoea after 6-minute-walk-test was measured using the Borg Scale. Quality of live was assessed with the Minnesota Living with Heart Failure Questionnaire (MLHFQ). RESULTS: 13 of 20 Patients finished the study. After 6 weeks of creatine supplementation there was a significant increase in body weight and muscle strength compared to baseline and placebo (p < 0.05). However, there was no significant change in peak VO2, VO2AT, walking distance, quality of life assessment and EF. CONCLUSION: Short-term creatine supplementation inaddition to standard medication in patients with CHF leads to an increase in body weight and an improvement of muscle strength. This effect is restricted to the time of supplementation.


Subject(s)
Creatine/pharmacology , Dietary Supplements , Heart Failure/physiopathology , Muscle, Skeletal/drug effects , Aged , Cross-Over Studies , Double-Blind Method , Elbow/physiology , Female , Heart Failure/diagnostic imaging , Humans , Male , Oxygen Consumption/physiology , Physical Fitness/physiology , Quality of Life , Surveys and Questionnaires , Ultrasonography , Walking/physiology
6.
Z Kardiol ; 94 Suppl 4: IV/70-80, 2005.
Article in German | MEDLINE | ID: mdl-16416070

ABSTRACT

Today's definition of coronary artery disease (CAD) comprises two forms: obstructive and non-obstructive CAD. The 31-72% chance of a life-threatening event-like a myocardial infarction-with non-obstructive CAD is well documented in numerous studies. The objective in modern strategies of diagnosis and therapy should therefore be expedient identification of patients at high risk for coronary events, who will benefit from a customized therapy. Before initiating diagnostic procedures of CAD, a well defined strategy should be pursued. There are two possible primary objectives: ASSESSMENT OF THE INDIVIDUAL RISK FOR A CORONARY EVENT: Assessment of the individual "absolute" risk for a coronary event is not possible using single traditional risk factors. The individual risk can be estimated by integrating several of the traditional risk factors into a scoring system. These so-called risk scores (e.g. Framingham score and Procam score), however, have been associated with shortcomings: insufficient discrimination of high-risk from low-risk individuals. The calcium score has therefore become increasingly established; this Agatston score is independent of the traditional risk factors, so there is no correlation between Agatston and Procam scores. Today, the calcium score is considered the superior test for identifying individuals at high risk for a coronary event and its use is recommended by the European Society of Cardiology (ESC) guidelines for prevention of cardiovascular diseases. PROOF OR EXCLUSION OF A HEMODYNAMICALLY SIGNIFICANT CORONARY STENOSIS: Another concept is the definitive proof or exclusion of a hemodynamically "significant" coronary narrowing. The probability of an obstructive CAD is traditionally assessed by the type of chest pain, age, gender and stress-ECG. In patients with a low probability of an obstructive CAD, cardiac catheterization is not indicated, whereas in patients with a high probability of a hemodynamically significant coronary stenosis, an invasive strategy should be performed. Since non-invasive coronary angiography (CTA) with cardiac-CT has been shown to provide a high negative predictive value, CTA (with good imaging quality) is suitable for ruling out a significant obstructive CAD in the group at intermediate risk for an obstructive CAD. Another approach could be a functional test to initially prove a relevant, inducible myocardial ischemia: In a large cohort it was shown that patients will only prognostically benefit from revascularization procedures if the ischemic myocardial area is greater than 10%. Therefore, the assessment of the extent of myocardial ischemia is the domain of modern stress imaging tests. Stress-echocardiography and myocardial scintigraphy have almost the same sensitivity (74-80%, 84-90%, respectively) and specificity (84-89%, 77-86%, respectively), which are considerably higher than for stress-ECG. Cardiac MR is most suitable for the assessment of myocardial perfusion, because it traces the first pass dynamics of gadolinium at rest and during stress in reproducible slices at an acceptable spatial and a high temporal resolution without ionizing radiation. Whether the non-invasive coronary angiography with cardiac-CT and the Adenosin-perfusion imaging with cardiac-MR will completely replace diagnostic cardiac catheterization and stress-echocardiography as well as myocardial scintigraphy remains to be evaluated in further studies.


Subject(s)
Coronary Disease/diagnosis , Magnetic Resonance Imaging , Myocardial Infarction/diagnosis , Tomography, X-Ray Computed , Coronary Angiography , Coronary Stenosis/diagnosis , Early Diagnosis , Germany , Humans , Practice Guidelines as Topic , Prognosis , Risk , Sensitivity and Specificity , Statistics as Topic
8.
Dtsch Med Wochenschr ; 129(9): 424-8, 2004 Feb 27.
Article in German | MEDLINE | ID: mdl-14970913

ABSTRACT

BACKGROUND AND OBJECTIVE: Animal data suggest that mobilized bone marrow cells (BMC) may contribute to tissue regeneration after myocardial infarction (MI). However the safety, feasibility and efficacy of treatment with granulocyte colony-stimulating factor (G-CSF) to mobilize BMC after acute myocardial infarction in patients is unknown. We analysed cardiac function and perfusion in 5 patients who were treated with G-CSF in addition to standard therapeutical regimen. METHODS AND RESULTS: 48 h after successful recanalization and stent implantation in 5 patients with acute MI, the patients received 10 micro g/kg bodyweight/day G-CSF subcutaneously for a mean treatment duration of 7.6+/-0.5 days. Peak value of CD34 (+) cells, a multipotent subfraction of bone marrow cells, was reached after 5.0+/-0.7 days. After 3 months of follow-up global left ventricular ejection fraction (determined by radionuclid-ventriculography) increased significantly from 42.2+/-6.6 % to 51.6+/-8.3 % (P<0.05). The wall motion score and the wall perfusion score (determined by ECG gated SPECT) decreased from 13.5+/-3.6 to 9.9+/-3.5 (P<0.05) and from 9.6+/-2.9 to 7.0+/-4.5 (P<0.05), respectively, indicating a significant improvement of myocardial function and perfusion. No severe side effects of G-CSF treatment could be observed. Malignant arrhythmias were not observed either. CONCLUSION: In patients with acute MI, treatment with G-CSF to mobilize BMC appears to be well tolerable under clinical conditions. Improved cardiac function and perfusion may be attributed to BMC-associated promotion of myocardial regeneration and neovascularization.


Subject(s)
Granulocyte Colony-Stimulating Factor/therapeutic use , Heart/physiology , Hematopoietic Stem Cell Mobilization/methods , Myocardial Infarction/therapy , Regeneration/drug effects , Adult , Aged , Angioplasty, Balloon, Coronary , Electrocardiography , Granulocyte Colony-Stimulating Factor/pharmacology , Humans , Male , Middle Aged , Myocardial Infarction/drug therapy , Myocardial Reperfusion , Myocardial Revascularization/methods , Stents , Tomography, Emission-Computed , Tomography, Emission-Computed, Single-Photon , Ventricular Function, Left/physiology
9.
Z Kardiol ; 91(7): 581-3, 2002 Jul.
Article in German | MEDLINE | ID: mdl-12242955

ABSTRACT

Discrete subaortic stenosis is an uncommon congenital cardiac disorder in which the left ventricular outflow tract is narrowed. We report about the diagnostic procedures and the successful balloon dilatation of a 49-year old, highly symptomatic male patient suffering from discrete subvalvular aortic stenosis.


Subject(s)
Aortic Stenosis, Subvalvular/therapy , Catheterization , Angiocardiography , Aortic Stenosis, Subvalvular/diagnosis , Echocardiography, Doppler , Echocardiography, Transesophageal , Humans , Male , Middle Aged , Treatment Outcome
10.
Circulation ; 104(23): 2784-90, 2001 Dec 04.
Article in English | MEDLINE | ID: mdl-11733395

ABSTRACT

BACKGROUND: Collateral circulation can maintain myocardial function and viability in chronic total coronary occlusion (TCO). The present study evaluates the relation of myocardial function and duration of occlusion to collateral function. METHODS AND RESULTS: A total of 50 patients underwent a successful recanalization of a TCO (>4 weeks' duration). Collateral function was assessed by intracoronary Doppler and pressure recordings before the first balloon inflation and after PTCA had been completed. Collateral function was assessed by Doppler- (CFI(D)) and pressure-derived collateral flow indices (CFI(P)), as well as indices of collateral (R(Coll)) and peripheral resistance (R(P)). Patients with normokinesia had lower R(Coll) (4.9+/-2.5 versus 11.8+/-8.2 mm Hg. cm(-1). s(-1); P=0.033) and lower R(P) (3.8+/-1.9 versus 6.1+/-4.1 mm Hg. cm(-1). s(-1); P=0.031) than those with akinesia. Patients with akinesia and a TCO duration of

Subject(s)
Collateral Circulation , Coronary Disease/physiopathology , Heart Ventricles/physiopathology , Aged , Angiography , Angioplasty, Balloon, Coronary , Chronic Disease , Coronary Disease/therapy , Echocardiography, Doppler , Female , Humans , Male , Middle Aged , Time Factors
11.
Am J Cardiol ; 88(9): 1001-5, 2001 Nov 01.
Article in English | MEDLINE | ID: mdl-11703996

ABSTRACT

In patients with idiopathic dilated cardiomyopathy, endothelium vasomotor function is disturbed. Increased oxidative stress and the consecutive formation of oxygen free radicals have been implicated as one possibility for this observation, suggesting that nitric oxide (NO) is inactivated by oxygen free radicals. We tested the hypothesis that the antioxidant, vitamin C, may improve endothelial function in idiopathic dilated cardiomyopathy. In 11 patients, the endothelium-dependent vasomotor response of the left anterior descending coronary artery to intracoronary acetylcholine (ACh) infusion (1/2 x 10(-6) mol/L, 1/4 x 10(-5) mol/L; respectively) was determined before and immediately after intravenous infusion of 3 g of vitamin C. Coronary cross-sectional diameter was obtained by quantitative coronary angiography, average peak velocity was measured by an intracoronary Doppler flow wire, and coronary blood flow (CBF) was calculated. Maximum cross-sectional diameter was determined after administration of nitroglycerin. Dose-dependent ACh showed a decrease in cross-sectional diameter (-5% to -7%, p <0.05) and an increase in average peak velocity (+16% to +25%, p <0.05); the CBF was unchanged (+1% to -2%, p = NS). After vitamin C infusion, the cross-sectional diameter increased in a dose-dependent manner from +11% to +15%, the average peak velocity increased from +20% to + 41% (p <0.05), and the CBF increased from +38% to + 82% (p <0.01, p <0.001, respectively). Thus, patients with idiopathic dilated cardiomyopathy had endothelial dysfunction, and administration of vitamin C reversed endothelium-dependent dysfunction.


Subject(s)
Antioxidants/pharmacology , Ascorbic Acid/pharmacology , Cardiomyopathy, Dilated/physiopathology , Coronary Vessels/physiopathology , Endothelium, Vascular/drug effects , Free Radical Scavengers/pharmacology , Antioxidants/therapeutic use , Ascorbic Acid/therapeutic use , Cardiomyopathy, Dilated/diagnostic imaging , Cardiomyopathy, Dilated/drug therapy , Coronary Angiography , Female , Free Radical Scavengers/therapeutic use , Hemodynamics/drug effects , Humans , Male , Middle Aged , Regional Blood Flow
12.
Circulation ; 104(10): 1129-34, 2001 Sep 04.
Article in English | MEDLINE | ID: mdl-11535568

ABSTRACT

BACKGROUND: Microvascular dysfunction is defined as reduced coronary flow reserve in the absence of an epicardial stenosis. This study determined its prevalence and relation to regional myocardial function in chronic total coronary occlusions (TCO). METHODS AND RESULTS: After recanalization and stenting of a TCO (duration, >4 weeks) in 42 patients, coronary flow velocity reserve (CFVR) was measured by intracoronary Doppler. In a subset of 27 patients, intracoronary pressure was recorded to obtain the fractional flow reserve (FFR). In 21 patients, the CFVR was reassessed after 24 hours. CFVR was <2.0 in 55% of all patients. In the subgroup with simultaneous pressure recordings, 52% of patients showed a CFVR<2.0 and a FFR>/=0.75, indicating microvascular dysfunction. Both reduced CFVR and reduced FFR occurred in only 2 patients (7.7%). CFVR and FFR were not correlated (r=0.03). A low CFVR was associated with a higher baseline average peak velocity (35.6+/-16.6 versus 22.4+/-11.5 cm/s; P=0.006). Doppler parameters did not change within 24 hours. Regional dysfunction had no influence on CFVR. Patients with diabetes and/or hypertension had a lower CFVR than those without this comorbidity (1.86+/-0.69 versus 2.36+/-0.45; P<0.05). CONCLUSIONS: Microvascular dysfunction was observed in 55% of TCOs, independent of the impairment of regional myocardial function. Dysfunction was observed more often in patients with diabetes and hypertension. Neither CFVR or FFR alone is appropriate for assessing angioplasty results in patients with a TCO; CFVR should be combined with FFR to differentiate microvascular dysfunction from residual coronary stenosis or diffuse disease.


Subject(s)
Coronary Circulation , Coronary Disease/physiopathology , Coronary Vessels/physiopathology , Aged , Angioplasty, Balloon, Coronary , Chronic Disease , Coronary Disease/complications , Coronary Disease/therapy , Coronary Vessels/pathology , Diabetes Complications , Heart Ventricles/pathology , Heart Ventricles/physiopathology , Humans , Hypertension/complications , Laser-Doppler Flowmetry , Middle Aged
13.
Z Kardiol ; 90(4): 280-5, 2001 Apr.
Article in German | MEDLINE | ID: mdl-11381576

ABSTRACT

OBJECTIVE: Advanced chronic heart failure is a hypercatabolic state with an imbalance between anabolic and catabolic metabolism and finally progressive loss of both muscle mass and adipose tissue. Leptin, the product of the obesity gene, is a hormone secreted by adipocytes. Therefore, we tested the hypothesis that plasma leptin concentrations are reduced in advanced chronic heart failure. METHODS: In 20 patients with chronic congestive heart failure (LVEF 23 +/- 6%) and 20 healthy controls (LVEF 65 +/- 8%) matched for gender, age, and body mass index, fasting plasma leptin (ELISA) and TNF alpha (ELISA) were measured. Follow-up examination was performed after 1 year. RESULTS: The fasting plasma leptin concentrations of patients with NYHA grade III (8.4 +/- 3.8 ng/ml*) and NYHA grade IV (4.6 +/- 2.4 ng/ml dagger) were significantly lower as compared with the controls (11.2 +/- 3.1 ng/ml; *p < 0.05, dagger p < 0.01). In patients with NYHA grade II plasma leptin levels were significantly elevated as compared with the healthy controls (14.9 +/- 4.2 ng/ml). TNF alpha was higher in heart failure patients than in healthy controls (8.6 +/- 3.6 pg/ml; 5.9 +/- 2.1 pg/ml; respectively; p < 0.05), but did not correlate with the NYHA functional class. Mortality of the controls was 0%, whereas 15% (n = 3) in the congestive heart failure group; one patient (5%) needs an urgent heart transplantation. All of those patients had leptin concentrations below 5 ng/ml. CONCLUSIONS: Plasma leptin concentrations correlate with the NYHA functional class suggesting anabolic metabolism in NYHA class II and catabolic metabolism in advanced heart failure which might be of prognostic relevance.


Subject(s)
Energy Metabolism/physiology , Heart Failure/diagnosis , Leptin/blood , Adult , Body Mass Index , Chronic Disease , Female , Heart Failure/physiopathology , Humans , Male , Matched-Pair Analysis , Middle Aged , Prognosis , Reference Values , Tumor Necrosis Factor-alpha/metabolism
14.
J Nucl Med ; 42(1): 49-54, 2001 Jan.
Article in English | MEDLINE | ID: mdl-11197980

ABSTRACT

UNLABELLED: In chronic heart failure, elevated plasma norepinephrine (NE) levels and a disparity between the neuronal release and the effective reuptake of NE lead to an increased concentration of NE in the presynaptic cleft, causing a downregulation of the myocardial beta-adrenoceptors. The clinical and prognostic effectiveness of beta-blocker therapy has been shown in patients with chronic heart failure in several large trials. The purpose of this study was to investigate the effect of long-term beta-blocker therapy on the cardiac adrenergic nervous system as assessed by the myocardial uptake of 123I-metaiodobenzylguanidine (MIBG), an analog of NE, in idiopathic dilated cardiomyopathy (IDC). METHODS: In 10 patients with IDC and stable chronic heart failure the myocardial MIBG uptake was measured at baseline and at 1 y (median, 11.5 mo) after treatment with beta-blockers (metoprolol, n = 5; bisoprolol, n = 1; and carvedilol, n = 4) in addition to standard medication. In parallel with the changes in MIBG uptake, the New York Heart Association functional class, the left ventricular ejection fraction (LVEF), and the left ventricular end-diastolic diameter (LVEDD) were documented before and after 1 y of therapy with beta-blockers. RESULTS: During the 1-y follow-up, a significant increase in myocardial 123I-MIBG uptake (P = 0.005) in parallel with an improved LVEF (P = 0.005) and a reduced LVEDD (P = 0.019) was found. A trend toward an improvement of the New York Heart Association functional class under the beta-blocker therapy (P = 0.139) was also found. CONCLUSION: Assessment of the myocardial 123I-MIBG uptake is a useful noninvasive tool for evaluating changes in cardiac sympathetic nerve activity under medical therapy. Long-term treatment with beta-blockers in IDC causes a recovery of the cardiac adrenergic nervous system concomitantly with a clinical and hemodynamic improvement.


Subject(s)
3-Iodobenzylguanidine , Adrenergic beta-Antagonists/therapeutic use , Cardiomyopathy, Dilated/diagnostic imaging , Cardiomyopathy, Dilated/drug therapy , Heart/innervation , Iodine Radioisotopes , Sympathetic Nervous System/physiopathology , Female , Follow-Up Studies , Heart/diagnostic imaging , Humans , Male , Middle Aged , Myocardium/metabolism , Prospective Studies , Radiopharmaceuticals , Technetium Tc 99m Sestamibi , Time Factors , Tomography, Emission-Computed, Single-Photon
15.
Catheter Cardiovasc Interv ; 51(3): 316-9, 2000 Nov.
Article in English | MEDLINE | ID: mdl-11066116

ABSTRACT

In two hemodynamically unstable patients, massive pulmonary embolism and free-floating right cardiac thrombi were diagnosed. Thrombolytic therapy was contraindicated and surgical treatment was rejected. In these two cases, we describe a successful non-surgical, percutaneous extraction of mobile right cardiac thrombi. Cathet. Cardiovasc. Intervent. 51:316-319, 2000.


Subject(s)
Heart Diseases/therapy , Thrombosis/therapy , Echocardiography, Transesophageal , Female , Heart Diseases/diagnostic imaging , Humans , Middle Aged , Thrombosis/diagnostic imaging , Vena Cava Filters
16.
Circulation ; 102(24): 2959-65, 2000 Dec 12.
Article in English | MEDLINE | ID: mdl-11113046

ABSTRACT

BACKGROUND: Coronary collaterals are essential to maintain myocardial function in chronic total coronary occlusions (TCOs). The aim of the present study was to assess the collateral circulation in TCOs before coronary angioplasty and to determine the recruitable collateral perfusion after recanalization by use of intracoronary Doppler flow velocimetry. METHODS AND RESULTS: In 21 patients with TCOs (duration >4 weeks), Doppler recordings of basal collateral flow were obtained before the first balloon inflation. Angioplasty was performed with stent implantation in all lesions. At the end of the procedure, recruitable collateral flow was measured during a repeat balloon inflation. The collateral flow index (CFI) was calculated from the velocity integral during the occlusion/velocity integral of antegrade flow. In 17 of 21 patients, angiography was repeated after 24 hours, and CFI was reassessed. Average peak velocity of collateral flow was 10.9+/-5.6 cm/s with a predominantly systolic flow (diastolic/systolic velocity ratio <0.5) compared with antegrade flow (diastolic/systolic velocity ratio >1.5). After recanalization, the average peak velocity of recruitable collateral flow dropped by >50% to 4.7+/-2.5 cm/s. CFI fell from 0.48+/-0.25 to 0.21+/-0.16 (P:<0.001). There was no further change of CFI during the following 24 hours. CFI was higher in patients with preserved regional ventricular function than in those with akinetic myocardium (0.57+/-0.23 versus 0.38+/-0.12, P:<0.05). CONCLUSIONS: Collateral circulation in TCO provided 50% of antegrade coronary flow. A considerable fraction of collateral flow was immediately lost after recanalization, indicating that TCO may not remain protected from future ischemic events by a well-developed collateral function.


Subject(s)
Angioplasty, Balloon, Coronary , Collateral Circulation , Coronary Disease/physiopathology , Aged , Angiography , Chronic Disease , Coronary Disease/therapy , Echocardiography, Doppler , Female , Humans , Male , Stents
17.
Z Kardiol ; 88(2): 123-32, 1999 Feb.
Article in German | MEDLINE | ID: mdl-10209833

ABSTRACT

Stent implantation serves as the gold standard for proximal lesions of the coronary arteries with a diameter between 2.75-3.5 mm. Our new concept aims at a reduced procedure duration and fluoro-time as well as a decreased ischemic period during stent implantation. A new therapeutic concept of a direct stent implantation without predilatation was tested using a specially developed balloon catheter on which various 14-16 mm long "slotted-tube" stents are mounted between two conical, radiopaque markers. In 105 consecutive patients, who were scheduled for angioplasty, this method of direct stent implantation was performed. Six of the procedures were performed for acute myocardial infarction and 8 in so-called high-risk procedures. The direct stent implantation was successful in 88%. In 6%, predilatation of the lesion site was necessary before stent placement. In the remaining 6%, a stent could not be successfully implanted despite the availability of various other systems. Comparison of the direct stent implantation with conventional stent placement with predilatation revealed that 1) The fluoro-time for direct stent implantation, compared to the conventional method, was 8.4 +/- 4.9 min vs. 13.7 +/- 8.0 min; p < 0.05, respectively. Furthermore, there were less balloons used per lesion for direct stent implantation (1.4 +/- 0.4) compared to the conventional method (1.7 +/- 0.7), but there was not a significant difference. 2) If we compare those patients with successful direct stent implantation with those with the unsuccessful procedures, the latter group had a higher percent of angiographically visible calcification at the site of the lesion (80% vs. 18%; p < 0.01). In addition, these patients had an increased average age (72 +/- 7 vs. 61 +/- 11 yrs; p < 0.01). The success rate of direct stent implantation did not depend on lesion diameter stenosis before PTCA. Stent dislocation was observed in 3.8% of the procedures, and a single case of stent embolism was seen. In conclusion, the direct stent implantation offers the advantages of a shortened fluoro-time, the use of fewer balloons, and has the potential of less ischemic stress compared to the conventional method of stent implantation with predilatation, if old patients with calcified lesions are excluded. This should be proved on a large scale in future studies also considering a learning curve with regard to the new method. Whether this new approach also reduces the restenosis rate, warrants further studies.


Subject(s)
Blood Vessel Prosthesis Implantation/instrumentation , Catheterization/instrumentation , Catheterization/methods , Stents , Adult , Aged , Aged, 80 and over , Angioplasty, Balloon, Coronary/adverse effects , Angioplasty, Balloon, Coronary/instrumentation , Angioplasty, Balloon, Coronary/methods , Blood Vessel Prosthesis Implantation/adverse effects , Catheterization/adverse effects , Female , Humans , Male , Middle Aged
18.
Thorac Cardiovasc Surg ; 46(4): 217-21, 1998 Aug.
Article in English | MEDLINE | ID: mdl-9776496

ABSTRACT

BACKGROUND: Endomyocardial biopsy (EMB) is the gold standard for detecting cardiac allograft rejection. However, EMB is invasive, costly, and unsuitable for frequent monitoring. Recent studies have shown that acute allograft rejection causes ventricular conduction disturbances. Therefore we tested the hypothesis that the electrocardiographic QTc interval correlates with the histopathologic degree of allograft rejection. METHODS: Between January 1994 and April 1997, 65 adult cardiac allograft recipients (mean age 52.1 +/- 1.7 years) were studied from transplantation until hospital discharge. During EMB, a 12-lead electrocardiogram was obtained. In grading acute allograft rejection, we used both the Texas Heart Institute (THI) scale and the International Society for Heart and Lung Transplantation (ISHLT) scale. 212 paired biopsy specimens and QTc intervals (mean 3.3 per patient) were obtained. We considered an increase of more than 10% of the QTc interval a rejection. RESULTS: Of the biopsy specimens 177 showed no or mild rejection (THI grade 0-5; ISHLT grade O-IIIA), and 35 showed moderate to severe rejection (THI grade 6-10; ISHLT IIIA-IV). The mean QTc interval was 449 +/- 2 msec for the first group and 517 +/- 11 msec for the second group (p = 0.0001). The correlation between the biopsy grades and the percentage of the changes in the QTc interval was r = 0.73 (p = 0.001). The QTc interval had a sensitivity of 86% (30/ 35) in predicting rejection and a specificity of 88% (1551177) in predicting the absence of rejection. CONCLUSIONS: Determination of the QTc interval is an accurate, noninvasive means of detecting acute cardiac rejection. Adoption of QTc testing may allow EMB to be used less frequently and more selectively.


Subject(s)
Electrocardiography , Graft Rejection , Heart Conduction System/physiopathology , Heart Transplantation , Female , Graft Rejection/pathology , Heart Function Tests/methods , Heart Transplantation/pathology , Humans , Male , Middle Aged , Myocardium/pathology , Predictive Value of Tests , Prognosis , Sensitivity and Specificity , Transplantation, Homologous
20.
Cardiology ; 89(3): 184-8, 1998 Mar.
Article in English | MEDLINE | ID: mdl-9570432

ABSTRACT

BACKGROUND: Although the use of a left-ventricular assist system (LVAS) provides circulatory support for end-stage heart failure patients awaiting heart transplantation, this procedure is accompanied by a relatively high perioperative mortality. The aim of this retrospective study was to identify those patients preoperatively which have the highest perioperative mortality. METHODS AND RESULTS: Forty-five consecutive patients undergoing LVAS implantation were evaluated for preoperative risk factors, including body mass index, hemodynamic data, and blood chemistry studies by multivariate analysis. They were divided into (1) patients who were successfully transplanted (n = 25) and (2) patients who died before transplantation (n = 20). The nonsurvivors were subclassified into patients who died within 14 days after surgery (n = 11) and patients who died after 2 weeks of device implantation (n = 9). Hemodynamic parameters were the same in both groups, but total cholesterol was significantly lower in the nonsurvivors than in the survivors (90 +/- 7 vs. 144 +/- 8 mg/dl, respectively, p < 0.0001). The sensitivity of predicting perioperative death with a serum cholesterol below 100 mg/dl was 100%, the specificity of predicting survival with a serum cholesterol above 120 mg/dl was 87%. CONCLUSION: In this small retrospective study, there was a correlation between total cholesterol levels and survival of patients with advanced heart failure on mechanical support. A cholesterol level below 100 mg/dl was accompanied by a high perioperative mortality. In contrast, a cholesterol level above 120 mg/dl was accompanied by a 87% chance of survival. The results suggest a predictive value of cholesterol which is independent of the hemodynamic status.


Subject(s)
Cholesterol/blood , Heart Failure/surgery , Heart Transplantation/mortality , Heart-Assist Devices , Postoperative Complications/mortality , Biomarkers/blood , Cardiomyopathies/complications , Cardiomyopathies/diagnosis , Follow-Up Studies , Heart Failure/blood , Heart Failure/mortality , Heart Transplantation/methods , Hemodynamics , Humans , Male , Middle Aged , Postoperative Complications/blood , Predictive Value of Tests , Reproducibility of Results , Retrospective Studies , Survival Rate
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