This article investigates the relationships between heart valve closure timing intervals and left ventricular systolic blood pressure (LVSBP). For this investigation, the cardiopulmonary system is modeled as an analog circuit, including heart chambers, the distal and proximal aorta, distal and proximal systemic arteries/veins, systemic capillaries, the vena cava, the distal and proximal pulmona...

background: about half of all patients who undergo mitral valve surgery suffer from atrial fibrillation (af). cox described the surgical cut-and-sew maze procedure, which is an effective surgical method but has some complications. this study was designed to evaluate the efficacy of a substitution method of radiofrequency ablation (rfa) for patients undergoing mitral valve surgery with af. metho...

OBJECTIVES The purpose of this study was to identify echocardiographic hemodynamic and morphometric factors that would predict which infants with critical aortic stenosis could undergo relief of left ventricular outflow obstruction as opposed to the Norwood procedure. BACKGROUND Echocardiographic predictors of survival in infants with critical aortic stenosis after two-ventricle repair have b...

Among 861 infants and children with coarctation of the aorta examined between 1950 and 1973, inclusive, 18 (2.1%) also had congenital mitral regurgitation (MR). Resection of the coarctation of the aorta was performed in 16 of these 18 patients (89%). There were three operative deaths early in the series, giving a total mortality rate of 18% since 1950. Over the past decade, mortality in this gr...

This paper is based largely on personal observations of normal and stenosed mitral valves. Some aspects that are new and some that are not in keeping with present-day concepts will be discussed. The mitral valve is a unit that consists of a so-called fibrous "ring," of two unequal cusps, of two sets of papillary muscles, and of numerous chorde tendinee. When two triangular leaflets are attached...

behcet’s disease is a rare immune mediated systemic vasculitis which besides it’s more frequent involvement of eyes and skin,   sometimes present with aortic pseudo aneurysm and more rarely cardiac inflammatory masses.a 51-year-old patient with behçet’s disease presented with two symptomatic aortic pseudoaneurysms concomitant with a right atrial mass. computed tomography (ct) revealed one supra...

A 62-year-old man was referred for an aortic-valve surgery because of severe aortic stenosis. Thirty years ago, he had undergone a mitral valve commissurotomy and after 9 years, the valve had been replaced by a mechanical valve. He had been undergoing hemodialysis for the past 8 years. A computed tomographic (CT) scan of the chest and abdomen showed a dense circumferential calcification in the ...

Mitral regurgitation due to 'floppy' valves is frequently associated with areas of medical necrosis in the ascending aorta. Application of the aortic clamp to such an area during valve replacement may produce an intimal tear followed by acute dissection. This complication occurred in three patients and was treated successfully by repair of the tear in the two cases where the dissection was obse...

A 62-year-old woman presented with a sudden transient ischemic attack (TIA). Symptoms resolved within 2 hours of onset. Neurological evaluation and workout for etiology of the TIA was unremarkable. Her medical history included having a St. Jude mitral valve replacement for mitral regurgitation 10 years before presentation. The patient had been maintained on warfarin with INR levels generally in...

Background—Leaflet escape is a mode of structural valve failure for mechanical prostheses. This complication previously has been reported for both monoleaflet and bileaflet valve models. We report 2 leaflet escape occurrences observed in 2 patients who underwent valve replacement with a TRI Technologies valve prosthesis. Methods and Results—At the University of Padua, between November 2000 and ...