A simple prognostic index in acute heart failure.

BACKGROUND: Rapid effective triage is integral to emergency care in patients hospitalized for heart failure, to guide the type and intensity of therapy. Several indexes and scores have been proposed to predict outcome; most of the them are complex and unfit to use at the bedside. METHODS: We propose a new prognostic index for in hospital mortality in acute heart failure. The index is calculated using the following formula: 220 - age - heart rate + systolic blood pressure - (creatinine ×10). The index was tested in 1628 patients admitted for acute heart failure and enrolled, from November 2007 to December 2009, in the Italian Registry on Heart Failure Outcome (IN-HF); a prospective, multicenter, observational study. RESULTS: The prognostic index was an independent predictor for in hospital mortality risk (AUC=0.74, P<0.0001), together with left ventricular ejection fraction (P=0.001), glycemia (P=0.019) and hemoglobin concentration (P=0.002). CONCLUSIONS: A simple prognostic index based on variables easily assessed can be useful to predict mortality in acute heart failure at the first arrival in hospital. The new index is independent from the left ventricular ejection fraction.

A prognostic index for risk stratification for acute heart failure and death in subjects with ischemic cardiomyopathy and cardiac defibrillator.

To propose a clinical prognostic index for death and heart failure in patients with ischemic cardiomyopathy implanted with an ICD. This prospective study included 192 consecutive patients (age 68 ± 10) recruited from 2004 to 2009 and implanted with an ICD for MADIT II criteria. All patients performed 24-h ambulatory blood pressure monitoring after discharge and common haematological samples. The prognostic index (PI) was built according to the formula: 120 - age + mean 24 h systolic blood pressure--(creatinine 9 10). Other variables were assessed: EF, haemoglobin concentration, mean 24 h heart rate and diastolic blood pressure, sodium level, pacing mode and diabetes. Non-arrhythmic cardiac death and new hospitalizations for heart failure during 1-year follow-up were the combined end point. A total of 48 events (25%) occurred during the follow-up: 7 cardiac deaths and 41 hospitalizations for acute heart failure. Cox proportional hazards model showed that PI was the only predictor of events (HR = 0.96; CI 95% 0.944­0.976, p < 0.0001). ROC curve showed that PI best cut-off was 144, with AUC 0.79, p < 0.0001; sensitivity 77%, specificity 74%, positive predictive value 50%, negative predictive value 90%. PI was predictive of events in a clinical setting where EF had no predictive value. PI works according to the rule ''the lower the worse''. The high negative predictive value (90%) of PI allows to identify subjects at lower risk for death and heart failure. PI can be a practical tool to stratify risk in ischemic cardiomyopathy.

Optimization of the atrioventricular delay in sequential and biventricular pacing: physiological bases, critical review, and new purposes.

Atrioventricular (AV) delay optimization in sequential and biventricular (BiV) pacing, although widely recommended, is often poorly performed in clinical practice as an improper setting can reduce the success of the stimulation. Despite the several methods proposed, the AV delay is frequently programmed in an empirical way or left to a predefined value (usually the manufacturer's setting), without considering the different variables involved in this context, concerning the intra- and interindividual variability of the electromechanical events, the peculiarities of the several cardiopathies, the spontaneous interatrial and AV conduction, the pharmacological therapy, and the pacing mode. The manuscript illustrates the physiological bases of the optimization, describes why and how to programme the best AV delay at rest and during daily activities and discusses critically all methods proposed, divided into three groups: predefined formulas, iterative attempts, and automatic settings. The manuscript is not only a review because it tries to clarify this complex topic, stating the fundamental concept in BiV pacing; the optimal AV delay should be short enough to have always a pre-exitated stimulation and contemporary an optimal left ventricular filling. The paper suggests new purposes and new solutions for this goal, it shows the limits of the actual guidelines and the disappointing results obtained in several studies by automatic methods, goading to find new algorithms.

Recovery of distal coronary flow reserve in LAD and LCx after Y-Graft intervention assessed by transthoracic echocardiography.

BACKGROUND: Y- graft (Y-G) is a graft formed by the Left Internal Mammary Artery (LIMA) connected to the Left Anterior Descending Artery (LAD) and by a free Right Internal Mammary Artery (RIMA) connected to LIMA and to a Marginal artery of Left Circumflex Artery (LCx). Aim of the work was to study the flow of this graft during a six months follow-up to assess whether the graft was able to meet the request of all the left coronary circulation, and to assess whether it could be done by evaluation of coronary flow reserve (CFR). METHODS: In 13 consecutive patients submitted to Y-G (13 men), CFR was measured in distal LAD and in distal LCx from 1 week after , every two months, up to six months after operation (a total of 8 tests for each patient) by means of transthoracic echocardiography (TTE) and Adenosine infusion (140 mcg/kg/min for 3-6 min). A Sequoia 256, Acuson-Siemens, was used. Contrast was used when necessary (Levovist 300 mg/ml solution at a rate of 0,5-1 ml/min). Max coronary flow diastolic velocity post-/pre-test > or =2 was considered normal CFR. RESULTS: Coronary arteriography revealed patency of both branches of Y-G after six months. Accuracy of TTE was 100% for LAD and 85% for LCx. Feasibility was 100% for LAD and 85% for LCx. CFR improved from baseline in LAD (2.21 +/- 0.5 to 2.6 +/- 0.5, p = 0.03) and in LCx (1.7 +/- 1 to 2.12 +/- 1, p = 0.05). CFR was under normal at baseline in 30% of patients vs 8% after six months in LAD (p = 0.027), and in 69% of patients vs 30% after six months in LCx (p = 0.066). CONCLUSION: CFR in Y-G is sometimes reduced in both left territories postoperatively but it improves at six months follow-up. A follow-up can be done non-invasively by TTE and CFR evaluation.

C-reactive protein and left atrial appendage velocity are independent determinants of the risk of thrombogenesis in patients with atrial fibrillation.

BACKGROUND: The association between inflammatory status and thrombosis in patients with atrial fibrillation (AF) is unclear. We studied the correlation between inflammation and the risk of thrombogenesis in patients with AF and the relationship of inflammation with other factors associated with thrombotic risk. METHODS: We studied 150 consecutive patients (69 men, age 65+/-12 years) with persistent non-valvular AF who had transesophageal echocardiography prior to cardioversion. Patients underwent also measurements of high-sensitivity C-reactive protein, fibrinogen, D-dimer, and hematocrit levels. RESULTS: Patients were divided into two groups according to the presence (n=52) or absence (n=98) of dense spontaneous echo contrast (SEC) in left atrium or left atrial appendage. The two groups were similar for age, sex, and major clinical risk factors. Patients with dense SEC had significantly larger left atrium diameter (p=0.007), lower left atrial appendage mean velocity (p<0.0001), and higher levels of C-reactive protein (p=0.003), D-dimer (p=0.008), and fibrinogen (p=0.006). At multivariate analysis, only left atrial appendage velocity (odds ratio: 19.11; 95% confidence interval 4.2-80.9) and C-reactive protein (odds ratio: 3.41; 95% confidence interval 1.2-9.8) were significantly associated with thrombus and/or dense SEC. However, there was no relationship between C-reactive protein levels and left atrial appendage velocity (p=0.24, r=-0.09). CONCLUSIONS: Our results show that left atrial appendage velocity and C-reactive protein are independently associated with the risk of thromboembolism in AF. Thus, blood stasis and inflammation appear to constitute two major distinct components of thrombogenesis.

[The digitalis: should we forget it?]. / La digitale: un farmaco da dimenticare?

For more than 200 years digitalis has been considered of paramount importance in the treatment of heart failure and atrial fibrillation. The IN-CHF Italian registry shows that prescriptions were reduced from 63.3% in the period 1995-1999 to 40% in the period 2000-2005, a very different trend compared to prescriptions of angiotensin-converting enzyme inhibitors, angiotensin receptor antagonists, and beta-blockers. The commercial value of digitalis is much lower than other drugs and it does not seem to be of interest for the pharmaceutical companies. Unfortunately, this is a logical trend in the business world. For many years the major indications of digitalis have been heart failure and atrial fibrillation. The most important study on efficacy of digitalis in the treatment of heart failure was the DIG trial (1997), which showed no difference in mortality when compared to placebo but significant beneficial effects in reducing hospital admission rates. Many post-hoc researches evaluated blood levels of digitalis and proved beneficial effects also on mortality when digoxinemia values were 0.5-0.9 ng/ml. In conclusion, digitalis should still be considered effective for the treatment of heart failure; therefore prescription modality as well as the range of normal values of digoxinemia should be updated.

Strain rate analysis and levosimendan improve detection of myocardial viability by dobutamine echocardiography in patients with post-infarction left ventricular dysfunction: a pilot study.

BACKGROUND: The assessment of myocardial viability by wall motion (WM) analysis on dobutamine echocardiography is subjective and provides suboptimal results. The aim of this study was to test the hypothesis that the prediction of functional recovery after revascularization can be improved by combining strain rate (SR) imaging, an objective method to quantify regional function, and levosimendan, a positive inotropic and vasodilator agent with no adrenergic effects. METHODS: Thirty postinfarction patients (mean age, 65 +/- 13 years) underwent, off drug, dobutamine (5-40 mug/kg/min) and then levosimendan (24 mug/kg in 10 minutes) echocardiography before percutaneous coronary intervention. WM score, peak systolic SR (SRs), end-systolic strain (Ses), and postsystolic strain (Sps) were assessed in all segments. Regional left ventricular functional recovery was identified by >/=1-point improvement in WM as assessed using the standard 16-segment model. RESULTS: Of 215 segments with abnormal resting function, 102 (47%) showed improvement in WM 8 months after revascularization. Functional recovery was predicted in 60 segments with dobutamine and in 76 segments with levosimendan (sensitivity, 59% vs 75%; P = .026), while failure to recover was identified in 93 segments with dobutamine and 90 segments with levosimendan (specificity, 82% vs 80%, P = NS). Overall there was significant agreement between the 2 tests (kappa = 0.73; P < .0001). Peak SRs in segments with functional recovery improved significantly (P = .001) with both dobutamine and levosimendan (from -1.36 +/- 0.41 to -1.87 +/- 0.59 and -1.99 +/- 0.49, respectively) but did not change in regions with unchanged WM at follow-up. There were no significant differences in Ses and Sps between rest and pharmacologic tests, with either dobutamine or levosimendan. Of note, an increment in peak SRs > -0.29 s(-1) after levosimendan had the highest specificity (93%) for predicting segmental functional recovery at follow-up (P = .001). CONCLUSION: The combination of a newer quantitative echocardiographic technique (SR analysis) and a newer pharmacologic agent (levosimendan) improves the sensitivity of viability assessment compared with conventional dobutamine echocardiography.

Transthoracic Doppler echocardiography for the assessment of left atrial appendage size and blood flow velocity: a multicentre study.

OBJECTIVE: The aim of this study was to evaluate the reliability of transthoracic Doppler echocardiography (TTE) in the assessment of left atrial appendage (LAA) size and function. METHODS: We considered 86 consecutive patients [56 male, 30 female; mean age 64 +/- 13 years, sinus rhythm 36 patients (42%); atrial flutter/fibrillation 50 patients (58%)] referred for transoesophageal echocardiography (TEE) and TTE. Maximum LAA transverse diameters and LAA peak flow velocities were calculated by two-dimensional and pulsed-wave Doppler analysis at TEE and TTE. RESULTS: LAA systolic transverse diameters were detectable in 78 patients (91%) by TTE and showed a significant correlation with TEE (r = 0.77, P < 0.0001). LAA peak flow velocities were measurable by TTE in 72 patients (84%) and were comparable with TEE (50.4 +/- 23 vs 47.3 +/- 23.2 cm/s, r = 0.67, P < 0.0001). A peak blood flow velocity of <25 cm/s at TTE was the best indicator of very low (<20 cm/s) LAA flow velocity as detected by TEE (sensitivity 93%, specificity 87%, area under the curve 0.94, P < 0.0001). Conversely, a peak blood flow velocity of >56 cm/s at TTE indicated a very high (> 40 cm/s) LAA flow velocity as detected by TEE (sensitivity 50%, specificity 96%, area under the curve 0.87; P < 0.0001). CONCLUSIONS: Reliable LAA size and blood flow velocities can be obtained by TTE in consecutive, unselected patients. TTE identifies patients with low and high blood flow velocities in the LAA, providing helpful information for the definition of individual embolic risk.

Levosimendan allows detection of contractile reserve in patients with chronic ischaemic left ventricular dysfunction and non-diagnostic dobutamine echocardiography.

BACKGROUND: Dobutamine echocardiography is commonly used to detect contractile reserve in ischaemic left ventricular (LV) systolic dysfunction, although its sensitivity and specificity are not optimal. We tested the hypothesis that echocardiography with levosimendan could identify contractile reserve in patients with a non-diagnostic dobutamine test. METHODS: Twenty-two patients with LV ejection fraction <40% and non-diagnostic dobutamine echocardiography underwent levosimendan challenge (24 microg/kg in 10 min) prior to coronary angioplasty or surgery. RESULTS: Contractile reserve was identified by levosimendan in 10 patients (Gr. A) but was not seen in 12 patients (Gr. B). With levosimendan, LV ejection fraction increased and wall motion score index decreased significantly in Gr. A, but only slightly in Gr. B. Similarly, mean mitral annular plane excursion and peak systolic mitral annular motion velocity increased significantly in Gr. A only. Six months after revascularisation, contractile reserve was seen in 8/10 Gr. A patients but in only 2/12 Gr. B patients (80% vs 17%, p=0.011). LV ejection fraction, wall motion score index, mean mitral annular plane excursion and peak systolic mitral annular motion velocity were significantly higher in Gr. A than in Gr. B. CONCLUSION: Levosimendan echocardiography can identify contractile reserve in a sizeable proportion of patients with chronic ischaemic LV dysfunction and a non-diagnostic dobutamine test.

Distal left circumflex coronary artery flow reserve recorded by transthoracic Doppler echocardiography: a comparison with Doppler-wire.

BACKGROUND: Coronary flow reserve (CFR) recording by means of transthoracic echocardiography (TTDE) in all the main distal coronary arteries is a challenge for advanced echocardiography. Validation studies of TTDE versus Doppler-wire (DW) recordings are available for Left Anterior Descending artery (LAD) and the Posterior Descending coronary artery (PD), but lacking for the more technically challenging Left Circumflex coronary artery (LCx). AIM: To evaluate the reliability of TTDE in assessing CFR in LCx when compared to the intracoronary Doppler flow-wire gold standard. METHODS: we evaluated 5 patients (age = 60 +/- 9 years, 5 males) on LCx by TTDE and invasive CFR assessment. TTDE recording was performed using a low-frequency probe, with a four-chamber as a guiding 2D view. The 2 tests were performed on different days and in random order within 48 hours in a blind fashion. Vasodilator stimulus was adenosine, intravenously (140 gamma/kg/min x 3-6 min) for TTDE and intracoronary (40 gamma bolus) for DW recordings. RESULTS: CFR values on LCx ranged from 1.9 to 2.8 for DW, and from 2.0 to 3.0 for TTDE, with an overall correlation of R = 0,85 (p = 0,06); normal (CFR > 2.5) or abnormal (CFR < 2.5) value was concordantly identified by the 2 techniques in 4 out 5 cases (80%). CONCLUSION: CFR of LCx artery can be obtained noninvasively with TTDE.

Relation of C-reactive protein to long-term risk of recurrence of atrial fibrillation after electrical cardioversion.

The aim of this study is to assess the role of C-reactive protein (CRP) in predicting long-term risk of atrial fibrillation (AF) recurrence after electrical cardioversion. CRP levels are associated with the presence of AF and failure of electrical or pharmacologic cardioversion, but no previous study has assessed their predictive role in long-term follow-up after successful electrical cardioversion. One hundred two consecutive patients (age 67 +/- 11 years; 58 men) with nonvalvular persistent AF who underwent successful biphasic electrical cardioversion were studied. High-sensitivity CRP was measured immediately before cardioversion. Follow-up was performed up to 1 year in all cases. Patients were divided into 4 groups according to CRP quartiles. Patients in the lowest CRP quartile (<1.9 mg/L) had significantly lower rates of AF recurrence (4% vs 33% at 3 months in the other 3 groups combined, p = 0.007, and 28% vs 60% at 1 year, p = 0.01). The 4 groups were similar in age, gender, ejection fraction, and left atrial size. Survival analysis confirmed that patients in the lowest CRP quartile had a lower recurrence rate (p = 0.02). Cox regression analyses using age, gender, hypertension, diabetes, ejection fraction, left atrial diameter, use of antiarrhythmic drugs, angiotensin-converting enzyme inhibitors or angiotensin II antagonists, and statins, and CRP quartiles as covariates showed that only CRP was independently associated with AF recurrence during follow-up (hazard ratio 4.98, 95% confidence interval 1.75 to 14.26, p = 0.003). In conclusion, low CRP is associated with long-term maintenance of sinus rhythm after cardioversion for nonvalvular AF.

Transthoracic echocardiography-guided biopsy of a right ventricular mass.

Biopsy of the heart has become a widely applied technique in circumstances such as detection of a transplant reject or histological diagnosis of masses. Biopsy is usually performed in the catheter laboratory (cath-lab) under fluoroscopic guidance. Echocardiography guidance is employed but as 'ancillary' comforting support to the cath-lab operator and for the early detection of complications. Until now, only a transesophageal approach has been used for guiding biopsy of intracardiac masses. Today, thanks to the current echocardiographic technology employing second harmonics, the definition of cardiac structures has consistently improved in the transthoracic approach, possibly allowing the full transthoracic procedure to be performed. We describe the biopsy of a large mass in the right ventricle, completely conducted without the help of fluoroscopy, and completed only under the help and guidance of transthoracic echocardiography.

Cumulative exercise-induced left ventricular systolic and diastolic dysfunction in hypertrophic cardiomyopathy.

The phenomenon of cumulative exercise-induced left ventricular function impairment was studied in 40 patients with non-obstructive hypertrophic cardiomyopathy with resting normal left ventricular function and no increase in ejection fraction on exercise. All patients underwent two symptom-limited exercise tests one-hour apart. Cumulative myocardial dysfunction was seen in 13 patients (group I) but not in the remaining 27 patients (group II). During follow-up, group I showed more commonly than group II a deterioration in symptoms (67% vs 22%, P=0.025) and left ventricular function (50% vs 9%, P=0.019). In conclusion, cumulative exercise-induced myocardial dysfunction can occur in hypertrophic cardiomyopathy and may be associated with clinical deterioration and worse outcome.

[Mitral valve prolapse]. / Il prolasso valvolare mitralico.

Mitral valve prolapse (MVP) is still a clinical challenging problem. In this report, we review the main characteristics of this entity. Epidemiology of MVP, which relies on the diagnostic criteria adopted, and the incidence of complications, both arrhythmic and structural, are influenced by the characteristics of the population studied, which may lead to bias in data interpretation. Even the definition of MVP may differ according to the cardiologist's or cardiac surgeon's point of view. Usually, cardiologists define MVP as the protrusion of all or part of the mitral leaflets into the left atrium, independent of maintenance of coaptation. Therefore, using this definition, mitral regurgitation is considered as a complication rather than a diagnostic criterion. Arrhythmias, either supraventricular or ventricular, are other possible complications, mostly not life-threatening and associated with myxomatous degeneration of the valve. Diagnosis of MVP is based on echocardiography, which provides detailed anatomic and functional evaluation of the affected valve. Leaflet thickness and motion as well as presence and severity of mitral regurgitation can be assessed, with important diagnostic and prognostic implications. Echocardiographic evaluation of the mitral valve requires a systematic approach in order to define the leaflet/scallop involved and the mechanisms of mitral regurgitation. To this aim, three-dimensional reconstruction may add further insights into objective rendering of mitral valve pathology. Finally, surgical timing in mitral regurgitation due to MVP is an evolving issue and the likelihood of surgical repair is a crucial factor in the optimal timing of surgical intervention, especially in asymptomatic patients with severe mitral regurgitation.

[Importance of spinal cord stimulation in the treatment of refractory angina]. / Il ruolo della stimolazione spinale nel trattamento dell'angina refrattaria.

A small non-quantified number of patients is reported to be affected by forms of angina pectoris already treated by traditional therapy but no longer able to achieve better results by drugs or surgery: this is called "refractory angina". Treatments like external counterpulsation, transmyocardial laser revascularization, stem cell transplantation or spinal cord stimulation may be suitable for these patients. The analysis of major studies on spinal cord stimulation based on exercise ECG, Holter monitoring and positron emission tomography, has shown a reduction in anginal attacks and in nitroglycerin pills. Though in small figures, an improved perfusion of the ischemic areas, an increase in the time of ischemia and cardiac mortality comparable to bypass surgery as well as a better quality of life and lower costs with respect to traditional treatment are also evident. Patients who are at high risk of mortality for bypass surgery, and who cannot receive significant benefits from revascularization or improved pharmacological therapy are candidate to spinal cord stimulation. Spinal cord stimulation is safe and effective in about 70% of patients. Some issues have not been investigated yet: the clinical characteristics of "non-responders" and the possibility of avoiding sudden cardiac death in stimulated patients.

[Two cardiac tumors with left ventricular location: myxoma and papillary fibroelastoma]. / Due rari casi di tumori cardiaci in sede ventricolare sinistra: mixoma ventricolare e fibroelastoma papillare.

We report 2 clinical cases of cardiac tumors, myxoma and papillary fibroelastoma, with unusual ventricular location. The clinical manifestations of these entities are not well described. Usually the patients are asymptomatic even if they have a high risk for cardiac and systemic embolic events so that these neoplasms are recognized during life more often in patients evaluated for embolic events of unclear pathology. The routine use of echocardiography has increased the detection of these tumors in living patients. In the surgical treatment, the approach should allow minimal manipulation of the tumors, inspection of all four cardiac chambers to overlook if tumors are multifocal and provide adequate exposure for complete resection. In our experience, we used two surgical approaches, via the left ventricle and via the aortic valve.

Giant vegetation of the mitral valve simulating primary cardiac tumor.

A case of a giant vegetation of the mitral valve causing sudden death of the patient is reported. The case underlines that urgent removal of a big mass must always be considered because of the risk of sudden death or catastrophic embolism. Echocardiographic differential diagnosis of a mass is discussed and is crucial for the choice of the strategy.

Ginkgo biloba-induced frequent ventricular arrhythmia.

The use of herbal medications is becoming ever more widespread, but data for them are not yet as robust as for conventional drugs. The available safety information indicates that potential side effects of such use can be due to allergic reactions and bleeding. In this report, a case of frequent ventricular arrhythmias probably due to Ginkgo biloba is presented. The patient complained of palpitations twice in a month and on both occasions symptoms and electrocardiographic evidence of ventricular arrhythmias resolved with discontinuation of Ginkgo biloba. This case underlines that continuing research is needed to elucidate the pharmacological activities of the many herbal remedies now being used.