Publications by authors named "Madhan Shanmugasundaram"

Background: Real-world mortality data regarding heart failure in patients with comorbid chronic kidney disease remains limited, especially following the advent of advanced heart failure therapies.

Methods: Using the CDC WONDER database, we included patients ≥ 25 years old who died primarily from heart failure (2011-2020) with comorbid chronic kidney disease. We calculated age-adjusted mortality rates (AAMR) per 100,000 individuals.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Persons aged 65 years or older, often referred to as the elderly, are a rapidly increasing population in the United States. Cardiovascular disease is the most common cause of morbidity and death in this age group, and acute coronary syndrome accounts for a significant proportion of the deaths. Percutaneous coronary intervention is a well-established treatment for acute coronary syndrome and symptomatic coronary artery disease.

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Peripheral artery disease (PAD) results from progressive narrowing of arteries secondary to atherosclerosis and is defined as an Ankle Brachial Index of <0.9. PAD is highly prevalent and is an increasing burden on both the economy and the patient, especially given the rapid shift in demographics in the United States.

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Objective: We have demonstrated that a return of spontaneous circulation in the first 3 mins of resuscitation in swine is predicted by ventricular fibrillation waveform (amplitude spectral area or slope) when untreated ventricular fibrillation duration or presence of acute myocardial infarction is unknown. We hypothesized that in prolonged resuscitation efforts that return of spontaneous circulation immediately after a second or later shock with postshock chest compression is independently predicted by end-tidal CO2, coronary perfusion pressure, and ventricular fibrillation waveform measured before that shock in a swine model of ischemic and nonischemic ventricular fibrillation arrest.

Design: Animal intervention study with comparison to a control group.

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Elderly or older adults constitute a rapidly growing segment of the United States population, thus resulting in an increase in morbidity and mortality related to cardiovascular disease-an increase that is reaching epidemic proportions. Dyslipidemia is a well established risk factor for cardiovascular disease and is estimated to account for more than half of the global cases of coronary artery disease. Despite the increased prevalence of dyslipidemia in the older adult population, controversy persists regarding the benefits of treatment in this group.

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