Higher inpatient mortality following percutaneous coronary intervention in patients with advanced chronic kidney disease.

BACKGROUND: Advanced chronic kidney disease (ACKD) is common in patients undergoing percutaneous coronary intervention (PCI) and is associated with adverse outcomes. These patients are often excluded from revascularization studies. The goal of this study was to evaluate the impact of ACKD in patients undergoing PCI. METHODS: We analyzed the national inpatient sample database to compare the inpatient mortality rate for ACKD patients [chronic kidney disease (CKD) stage 3 and above] who underwent PCI between 2006 and 2011 to patients without ACKD. Specific ICD-9 CM codes were used to identify these patients. RESULTS: A total of 1 826 536 PCIs were performed during the study period, of which 113 018 (6.2%) were patients with advanced CKD. The age-adjusted inpatient mortality rates were significantly higher in the ACKD group in all years studied compared to the no CKD group. For the first year studied in 2006, the age-adjusted mortality rate for patients undergoing PCI was 149 per 100 000 vs. 48 per 100 000 in patients without ACKD (P < 0001). In the last year studied in 2011, age-adjusted mortality was 124.1 per 100 000 vs. 40.4 per 100 000 in patients with no ACKD, (P < 0.0001). The presence of ACKD remained independently associated with higher mortality despite multivariate adjustment (odds ratio: 1.32, confidence interval: 1.27-1.36, P < 0.001). CONCLUSION: ACKD is independently associated with higher mortality in patients undergoing PCI. Therefore, PCI in these patients should be performed with more caution.

Optical Coherence Tomography in the Assessment and Management of Cardiac Allograft Vasculopathy.

PURPOSE OF REVIEW: Cardiac Allograft vasculopathy (CAV) is a major barrier to improving outcomes after heart transplantation. Coronary angiography has very low sensitivity to detect early CAV and intravascular ultrasound (IVUS) only improves it to some extent. In this article, we detail the current evidence surrounding use of Optical Coherence tomography (OCT) in patients with CAV. RECENT FINDINGS: OCT has the ability to recognize CAV at earlier stages with intimal thickness < 150 µm, can characterize CAV in almost pathologic / microscopic detail - plaque characteristics are better visualized and novel early features such as layered fibrotic plaques and microchannels have been identified. Progression of CAV can be monitored also, with promise shown in automated serial measurements also. OCT has significantly advanced our understanding of the pathophysiology-as well as permits precise monitoring and surveillance of the disease. Potential treatment options could also be evaluated using OCT.

Percutaneous Large Thrombus and Vegetation Evacuation in the Catheterization Laboratory.

Intracardiac and intravascular thrombi are associated with significant morbidity and mortality. Although surgery remains the gold standard treatment option, these patients often have multiple comorbidities that can make surgical options challenging. With advancements in catheter-based technologies, there are now percutaneous treatment options for these patients. The AngioVac is a percutaneous vacuum-assisted thrombectomy device FDA-approved for removal of intravascular debris that uses a venovenous extracorporeal membranous oxygenation circuit with a filter. Use of this device has now been reported in the removal of right atrial or iliocaval thrombi, debulking tricuspid vegetations, removal of vegetations from implantable cardiac devices, and pulmonary embolism.

Transcatheter Closure of Complex Left Circumflex to Coronary Sinus Fistula.

Coronary artery fistulae connecting the left circumflex to the coronary sinus are rare. Surgical closure of coronary sinus connections is technically challenging because of the location, especially in high-risk surgical patients. We used multimodality imaging to delineate the drainage site and successfully closed a left circumflex to coronary sinus fistula using a transcatheter closure technique. (Level of Difficulty: Advanced.).

Five-meter walk test before transcatheter aortic valve replacement and 1-year noncardiac mortality.

Objective: The purpose of this study is to assess whether the 5-m walk test is associated with 1-year mortality after transcatheter aortic valve replacement. Methods: Included in the analysis were 304 patients who received the 5-m walk test and underwent transcatheter aortic valve replacement from September 2012 to March 2019. They were classified into 3 groups based on their test score: ≤7, >7, and unable to walk. Preprocedure characteristics, postprocedure outcomes, and follow-up outcomes were compared between the groups. Results: For the 5-m walk test, 145 had a score ≤7 (Group N), 111 had a score >7 (Group S), and 48 were unable to walk (Group I). Average age in years was 80.2 ± 8.7 years in Group N, 81.2 ± 9.4 years in Group S, and 79.4 ± 9.2 in Group I (P = .23). The aortic valve mean gradient at discharge was 9.5 ± 4.1 mm Hg in Group N, 10.4 ± 5.5 mm Hg in Group S, and 8.2 ± 4.2 mm Hg in Group I (P = .05). The discharge survival was 97.2% in Group N, 96.4% in Group S, and 95.8% in Group I (P = .76). One-year survival was 92.8% in Group N, 84.1% in Group S, and 75% in Group I (P < .01) after adjusting for preprocedure characteristics. Noncardiac death was 5.1% in Group N, 13.1% in Group S, and 22.7% in Group I (P = .03). This indicates that the 5-m walk test was a risk factor for 1-year mortality. More specifically, a poor 5-m walk test score was associated with 1-year noncardiac mortality. Conclusions: The 5-m walk test score before transcatheter aortic valve replacement was associated with 1-year mortality, especially noncardiac mortality. It may help identify patients at high risk for 1-year mortality.

Medical Therapy Versus Revascularization in Patients with Stable Ischemic Heart Disease and Advanced Chronic Kidney Disease.

PURPOSE OF REVIEW: This article reviews the evidence on optimal medical therapy (OMT) versus coronary revascularization in patients with stable ischemic heart disease (SIHD) and advanced chronic kidney disease (CKD). RECENT FINDINGS: A post hoc analysis of the COURAGE trial in patients with SIHD and CKD showed no difference in freedom from angina, death, and nonfatal myocardial infarction (MI) between OMT and percutaneous intervention plus OMT compared with patients without CKD. The ISCHEMIA-CKD trial of 777 patients with advanced CKD revealed no difference in cumulative incidence of death or nonfatal MI at 3 years between OMT and revascularization but the composite of death or new dialysis was higher in the invasive arm. Additionally, there were no significant or sustained benefits in related to angina-related health status in invasive versus conservative strategy. An initial revascularization strategy does not reduce mortality or MI or relieve angina symptoms in patients with SIHD and advanced CKD.

Glucose-Lowering Medications and Cardiovascular Outcomes.

PURPOSE OF THE REVIEW: The purpose of this review is to examine recent evidence supporting CV safety profile and improvement of CV outcomes of some of the newer classes of diabetic medications. RECENT FINDINGS: Diabetes mellitus (DM) is associated with increased risk of cardiovascular disease (CVD). Thus, CVD management is critical in diabetic patients. Since 2008, the US Food and Drug Administration (FDA) has mandated that all newer diabetic medications should establish cardiovascular safety before it is approved for use. Diabetic medications that also lower CV risk would be a significant advancement as shown in recent studies. There are 3 new class of diabetic medications: Dipeptidyl peptidase-4 inhibitors (DPP-4), glucagon-like peptide receptor agonists (GLP-1 RA), and sodium-glucose cotransporter type 2 (SGLT 2) inhibitors which have established both CV safety and improvement in CV outcomes with some drugs. In patients with type 2 diabetes and established atherosclerotic cardiovascular disease, multiple atherosclerotic cardiovascular disease risk factors, or diabetic kidney disease, a sodium-glucose cotransporter 2 inhibitor, or a glucagon-like peptide 1 receptor agonist with demonstrated cardiovascular benefit is recommended to reduce the risk of major adverse cardiovascular events.

Outcomes of rotational atherectomy versus orbital atherectomy for the treatment of heavily calcified coronary stenosis: A systematic review and meta-analysis.

INTRODUCTION: The optimal approach to deal with severe coronary artery calcification (CAC) during percutaneous coronary intervention (PCI) remains ill-defined. METHODS: We conducted an electronic database search of all published studies comparing Orbital versus Rotational Atherectomy in patients undergoing PCI. RESULTS: Eight observational studies were included in the analysis. Overall, there were no significant differences in Major-adverse-cardiac-events/MACE (OR: 0.81, CI: 0.63-1.05, p = .11), myocardial-infarction/MI (OR: 0.75, CI: 0.56-1.00, p = .05), all-cause mortality (OR: 0.82, CI: 0.25-2.64, p = .73) or Target-vessel-revascularization/TVR (OR: 0.72, CI: 0.38-1.36, p = .31). However, OA was associated with lower long-term MACE (1-year), (OR: 0.66, CI: 0.44-0.99, p = .04), long-term TVR (OR: 0.40, CI: 0.18-0.89, p = .03), and short-term MI (in-hospital and 30-day) (OR: 0.64, CI: 0.44-0.94, p = .02). OA was associated with more coronary artery dissections (OR: 2.61, CI: 1.38-4.92, p = .003) and device-related coronary perforations (OR: 2.79, CI: 1.08-7.19, p = .03). There were no differences in cardiac tamponade (OR: 1.78, CI: 0.37-8.69, p = .47). OA was noted to have significantly lower fluoroscopy time (MD: -3.96 min, CI: -7.67, -0.25; p = .04) compared to RA. No significant difference was noted in terms of contrast volume between the two groups (OR: -4.35 ml, CI: -14.52, 23.22; p = .65). CONCLUSION: Although there was no difference in overall MACE, MI, all-cause mortality and TVR, OA was associated with lower long-term MACE and short-term MI. OA is associated with lower fluoroscopy time but higher rates of coronary artery dissection and coronary perforation.

Extending Time to Reperfusion with Mild Therapeutic Hypothermia: A New Paradigm for Providing Primary Percutaneous Coronary Intervention to Remote ST Segment Elevation Myocardial Infarction Patients.

Primary percutaneous coronary intervention (PPCI) is the preferred treatment for acute ST segment elevation myocardial infarction (STEMI). The goal is reperfusion within 90 minutes of first medical contact (FMC) or 120 minutes if transfer is needed. Otherwise, fibrinolytic therapy is recommended. Mild therapeutic hypothermia (MTH) (≤35°C) before coronary reperfusion decreases myocardial infarct size. If applied before reperfusion, hypothermia could potentially lengthen the FMC-reperfusion time without increasing infarct size. Thirty-six swine had their mid left anterior descending coronary artery acutely occluded. All animals had an initial 30 minutes of occlusion to simulate typical delay before seeking medical attention. Eighteen animals were studied under normothermic conditions with reperfusion after an additional 40 minutes (the porcine equivalent of a 120-minute clinical FMC to reperfusion time) and 18 were treated with hypothermia but not reperfused until another 80 minutes (clinical equivalent of 240 minutes). Primary outcome was myocardial infarct size (infarct/area at risk [AAR]) at 24 hours. The two groups differed in systemic temperature at the time of reperfusion (39.1°C ± 1.0°C vs. 35.5°C ± 0.7°C; p < 0.0001). Myocardial infarct size was not significantly different despite the longer time to reperfusion in those treated with hypothermia (60.6% ± 12% of the AAR [normothermic] vs. 65.8% ± 11.8% of the AAR [hypothermic]; p = 0.39). Rapid induction of MTH during an anterior STEMI made it possible to extend the FMC to reperfusion time by the equivalent of an extra two clinical hours (120-240 minutes) without increasing the myocardial infarct size. This strategy could allow more STEMI patients to receive PPCI rather than the less effective intravenous fibrinolysis.

An Updated Review on Myocardial Bridging.

Myocardial bridging is a congenital coronary anomaly with normal epicardial coronary artery taking an intra-myocardial course also described as tunneled artery. The majority of patients with this coronary anomaly are asymptomatic and generally it is a benign condition. However, it is an important cause of myocardial ischemia, which may lead to anginal symptoms, acute coronary syndrome, cardiac arrhythmias and rarely sudden cardiac death. There are numerous studies published in the recent past on understanding the pathophysiology, diagnostic and management strategies of myocardial bridging. This review highlights some of the recent updates in the diagnosis and management of patients with myocardial bridging. We discuss the role of various non-invasive and invasive diagnostic methods to evaluate functional significance of bridging. In addition, role of medical therapy such as beta-blockers, percutaneous coronary intervention with stents/bioresorbable scaffolds and surgical unroofing in patients unresponsive to medical therapy is highlighted as well.

Outcomes of Patients with Atrial Fibrillation Undergoing Percutaneous Coronary Intervention Analysis of National Inpatient Sample.

BACKGROUND: Atrial fibrillation (AF) is the most common cardiac arrhythmia with a prevalence of 15% of patients over 80 years. Coronary artery disease co-exists in 20-30% of patients with atrial fibrillation. The need for triple anticoagulation therapy makes the management of these patients challenging following PCI. METHODS: Nationwide inpatient sample which is a set of longitudinal hospital inpatient databases was used to evaluate the outcome of patients with AF who underwent PCI. All patients undergoing PCI between 2002 and 2011 were included in the study. Specific ICD-9-CM codes were used to identify the study patients and their outcomes. RESULTS: There were 3,226,405 PCIs during the time period of the study of which 472,609 (14.6%) patients had AF. AF patients were older and predominantly male (60%). The number of PCIs had a declining trend from 2002 to 2011. Age adjusted inpatient mortality was significantly higher in PCI AF group compared to the PCI non-AF group (100.82 ±â€¯9.03 vs 54.07 ±â€¯8.96 per 100,000; P < 0.01). Post PCI predictors of mortality were AF (OR 1.56, CI 1.53-1.59), CKD (OR 1.41, CI 1.37-1.46), PAD (OR 1.20, CI 1.15-1.24), acute myocardial infarction (OR 2.42 CI 2.37-2.46 and cardiogenic shock (OR 13.92 CI 13.60-14.24) P < 0.001. CONCLUSION: AF is common in patients undergoing PCI and those AF patients have a higher age-adjusted all cause inpatient mortality. There is a decline in total number of PCIs over time in US. Atrial fibrillation, chronic kidney disease, peripheral artery disease, MI and cardiogenic shock were associated with increased mortality following PCI.

Outcomes of Percutaneous Coronary Intervention in Atrial Fibrillation Patients Presenting With Acute Myocardial Infarction: Analysis of Nationwide Inpatient Sample Database.

BACKGROUND: Atrial fibrillation (AF) is common in patients presenting with myocardial infarction (MI). Percutaneous coronary intervention (PCI) has been shown to improve cardiovascular outcomes in MI. However, outcomes of PCI in AF patients presenting with MI remains largely unknown. METHODS: We analyzed the Nationwide Inpatient Sample (NIS) database to calculate the age adjusted mortality rate for PCI in AF patients presenting with MI between 2002 and 2011, in adults over 40 years of age. This was then compared to the mortality rate for PCI in non-AF patients with MI. Specific ICD-9-CM codes were used to identify patients and outcomes. RESULTS: Of 3,226,405 PCIs done during the study period, 472,609 (14.6%) PCIs were done on AF patients of which 137,870 PCIs were for MI. About 60% of these patients were male. Patients with AF were older (71.3 ±â€¯10.6 years). Overall the number of PCIs shows a declining trend from 2002 to 2011, but for MI patients the number of PCIs appears stable over the years. The age adjusted in-hospital mortality following PCI in MI was significantly higher in AF group compared to the non-AF group (190.24 ±â€¯17.21vs 109.08 ±â€¯5.89 per 100,000; P < 0.01). This trend was seen during the entire study period. CONCLUSIONS: AF is prevalent in MI patients undergoing PCI. AF is associated with increased mortality following PCI for acute MI. AF is not a benign arrhythmia in MI patients and close attention is warranted in these patients to improve mortality.

Diabetic cardiomyopathy - A comprehensive updated review.

Diabetes causes cardiomyopathy and increases the risk of heart failure independent of hypertension and coronary heart disease. This condition called "Diabetic Cardiomyopathy" (DCM) is becoming a well- known clinical entity. Recently, there has been substantial research exploring its molecular mechanisms, structural and functional changes, and possible development of therapeutic approaches for the prevention and treatment of DCM. This review summarizes the recent advancements to better understand fundamental molecular abnormalities that promote this cardiomyopathy and novel therapies for future research. Additionally, different diagnostic modalities, up to date screening tests to guide clinicians with early diagnosis and available current treatment options has been outlined.

Drug-coated balloon in peripheral artery disease.

Peripheral artery disease (PAD) is highly prevalent but is often underdiagnosed and undertreated. Lower extremity PAD can often be life style limiting. Revascularization in carefully selected lower extremity PAD patients improves symptoms and functional status. Surgical revascularization used to be the only available strategy, but in the recent years, endovascular strategies have gained popularity due to faster recovery times with low morbidity and mortality rates. Endovascular procedures have increased significantly in the United States in the past few years. That being said, higher restenosis rates and low long-term patency rates have been the limiting factors for this strategy. Drug eluting stents have been introduced to help with lowering restenosis, however lower extremity PAD involves long segment where the outcomes of stents are suboptimal. Also, the disease often crosses joint line that makes it less ideal for the stents. Drug-coated balloons (DCB) have been introduced to improve patency rates following endovascular intervention for lower extremity PAD. They have gained popularity among endovascular specialists due to its ease of use and the concept of "leave nothing behind". This is a review of scientific evidence supporting DCB use in PAD.

Drug-Eluting Versus Bare Metal Stents in Saphenous Vein Graft Intervention: An Updated Comprehensive Meta-Analysis of Randomized Trials.

BACKGROUND: Drug eluting stents (DES) are preferred over bare metal stents (BMS) for native coronary artery revascularization unless contraindicated. However, the preferred stent choice for saphenous venous graft (SVG) percutaneous coronary interventions (PCI) is unclear due to conflicting results. METHODS: PubMed, Clinical trials registry and the Cochrane Center Register of Controlled Trials were searched through June 2018. Seven studies (n = 1639) comparing DES versus BMS in SVG-PCI were included. Endpoints were major adverse cardiac events (MACE), cardiovascular mortality, all-cause mortality, myocardial infarction (MI), target vessel revascularization (TVR), target lesion revascularization (TLR), in-stent thrombosis, binary in-stent restenosis, and late lumen loss (LLL). RESULTS: Overall, during a mean follow up of 32.1 months, there was no significant difference in the risk of MACE, cardiovascular mortality, all-cause mortality, MI, stent thrombosis, TVR and TLR between DES and BMS. However, short-term follow up (mean 11 months) showed lower rate of MACE (OR 0.66 [0.51, 0.85]; p = 0.002), TVR (OR 0.47 [0.23, 0.97]; p = 0.04) and binary in-stent restenosis (OR 0.14 [0.06, 0.37]; p < 0.0001) in DES as compared with BMS. This benefit was lost on long-term follow up with a mean follow up 35.5 months. CONCLUSION: In this meta-analysis of SVG-PCI, DES use was associated with similar MACE, cardiovascular mortality, all-cause mortality, MI, in-stent thrombosis, TVR and TLR compared with BMS during long-term follow up. There was high incidence of MACE noted in both DES and BMS suggesting a need for exploring novel strategies to treat SVG disease to improve clinical outcomes.

Refractory Out of Hospital Cardiac Arrest.

Refractory out of hospital cardiac arrest is a common problem that is associated with poor overall survival rates and neurological outcomes. There are various definitions that have been used but the most accepted one is cardiac arrest that requires more than 10 minutes of Cardiopulmonary Resuscitation (CPR) efforts or more than 3 defibrillation attempts. There have been different pharmacologic and non-pharmacologic therapies that were studied in these patients. None of the antiarrhythmic or vasopressor medications have been consistently shown to improve survival or neurological outcomes in this subset of patients. This has led to the introduction of various devices aimed at improving outcomes such as mechanical CPR devices, Extracorporeal Cardiopulmonary Resuscitation (ECPR), targeted temperature management and early invasive approach. There is accumulating evidence that there seems to be an improvement in outcomes when these devices are used in refractory cardiac arrest patients. But none of these devices have been shown to improve outcomes when used in isolation. This underscores the importance of systematic approach to these complex patients and using these therapies in combination. There has been a paradigm shift in the approach to these patients. Instead of repeated and prolonged CPR attempts in the field, it is suggested that these patients need to be moved to cardiac arrest centers with a mechanical CPR device in place, so a percutaneous Extracorporeal Membrane Oxygenator (ECMO) can be placed to "buy" time for other therapies such as therapeutic hypothermia and early coronary angiography followed by intervention as indicated. Careful selection of patients who might potentially benefit from this approach is critical to the success of these programs.

Insertion of the Impella via the axillary artery for high-risk percutaneous coronary intervention.

Hemodynamic support with the Impella device is an important tool during high risk percutaneous coronary intervention. This device is usually inserted via the femoral artery. However, some patients have severe peripheral artery disease precluding the use of the femoral artery for this purpose. The axillary artery is a viable alternative in these cases. We reviewed the two access techniques for inserting the Impella via the axillary artery and also described 6 cases of successful implantation.

Analysis of amplitude spectral area and slope to predict defibrillation in out of hospital cardiac arrest due to ventricular fibrillation (VF) according to VF type: recurrent versus shock-resistant.

BACKGROUND: In out-of-hospital cardiac arrest (OHCA) due to ventricular fibrillation (VF), VF may recur during resuscitation (recurrent VF) or fail to defibrillate (shock-resistant VF). While retrospective studies have suggested that amplitude spectral area (AMSA) and slope predict defibrillation, it is unknown whether the predictive power is influenced by VF type. We hypothesized that in witnessed OHCA with initial rhythm of VF that the utility for AMSA and slope to predict defibrillation would differ between shock-resistant and recurrent VF. METHODS: AMSA and slope were measured immediately prior to each shock. For second or later shocks, VF was classified as recurrent or shock-resistant. Cardiac arrest was classified according to whether the majority of shocks were for recurrent VF or shock-resistant VF. RESULTS: 44 patients received 98 shocks for recurrent VF and 96 shocks for shock-resistant VF; 24 patients achieved ROSC in the field. AMSA and slope were higher in recurrent VF compared to shock-resistant VF (AMSA: 28.8±13.1 vs 15.2±8.6 mVHz, P<0.001, and slope: 2.9±1.4 vs 1.4±1.0 mVs(-1), P=0.001). Recurrent VF was more likely to defibrillate than shock-resistant VF (P<0.001). AMSA and slope predicted defibrillation in shock-resistant VF (P<0.001 for both AMSA and slope) but not in recurrent VF. Recurrent VF predominated in 79% of patients that achieved ROSC compared to 55% that did not (P=0.10). CONCLUSIONS: In witnessed OHCA with VF as initial rhythm, recurrent VF is associated with higher values of AMSA and slope and is likely to re-defibrillate. However, when VF is shock-resistant, AMSA and slope are highly predictive of defibrillation.