Peter M Pollak

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In most cases of acute ST-segment elevation myocardial infarction, only 1 epicardial artery contains an occluding thrombus, commonly referred to as the "culprit" artery. Rarely, however, patients present with >1 acutely thrombosed coronary artery (i.e., "multiple culprits"). The investigators present their experience with 18 patients presenting with(More)
OBJECTIVES To determine event-free survival after transcatheter closure of ventricular septal defect (VSD), and to identify predictors of adverse events (AE) in post myocardial infarction VSD (post-MI VSD) subgroup. BACKGROUND There are limited data on mid-term follow-up after transcatheter VSD closure. METHODS Retrospective review of 27 cases of(More)
Transcatheter aortic valve replacement (TAVR) is a transformative technology for the treatment of aortic stenosis, requiring a multidisciplinary collaboration in the form of a "heart team" that includes interventional cardiologists and cardiac surgeons. As this new technology continues to disperse rapidly, its proper therapeutic role evolves and leads to(More)
OBJECTIVES The aim of this study is to provide a summary of the currently applied aortic paravalvular leak (PVL) closure techniques and describe the procedural and long-term outcomes in a large consecutive cohort of patients. BACKGROUND Percutaneous repair has emerged as an effective therapy for patients with PVL. To date, clinical outcome data on(More)
OBJECTIVES This study sought to examine the feasibility, safety, and intermediate-term outcomes in patients undergoing percutaneous transvenous transcatheter mitral valve implantation in failed bioprosthesis, ring annuloplasty, and calcific mitral stenosis. BACKGROUND Surgical mitral valve replacement in patients with previous surgery or severe mitral(More)
We have designed, built and tested a novel needle for percutaneously accessing the pericardial space. The problem with accessing pericardial space is that the pericardium is against the heart. Our novel device incorporates a single spiral tine at the distal tip of a10-gauge needle, which engages the parietal pericardium tangentially to the surface of the(More)
OBJECTIVES The aim of this paper is to describe the feasibility of a novel transcatheter approach for mitral valve replacement using only venous access. BACKGROUND Failure of mitral valve prostheses necessitating reoperation can represent a high-risk clinical scenario. Although repeat cardiac surgery remains the standard of care for most failed mitral(More)
Background Although mortality from myocardial infarction (MI) has decreased due to improved reperfusion strategies, adverse left ventricular (LV) remodeling after MI is associated with poor long-term prognosis and is thus an important therapeutic target. We developed a Yucatan mini-pig model of reperfused MI using percutaneous techniques for coronary(More)
The Neher-McGrath (NM) method for calculating temperature rises and current-carrying capacities of insulated nonshielded power cables rated 0-2000 V phase-to-phase is described. The concept of the thermal circuit is explained, NM equations for calculating thermal resistances are given and sample calculations are presented.
OBJECTIVES The aim of this study was to examine 1-year outcomes of transseptal balloon-expandable transcatheter heart valve implantation in failed mitral bioprosthesis, ring annuloplasty, and mitral annular calcification (MAC). BACKGROUND Immediate outcomes following transseptal mitral valve implantation in failed bioprostheses are favorable, but data on(More)