We report a patient who developed aortic regurgitation and first degree atrioventricular block caused by infective endocarditis complicating aortic valve stenosis. There was premature closure of the mitral valve and, in the absence of an Austin Flint murmur, a simultaneous high frequency sound was audible which we regard as a presystolic first heart sound. That such a sound may be associated wi...

OBJECTIVE : To test an alternative to catheter and open-heart techniques, by documenting the feasibility of implanting an unmodified mechanical aortic valve (AoV) in the off pump, beating heart using the universal cardiac introducer (UCI) attached to the left ventricular (LV) apex. METHODS : In six pigs, the LV apex was exposed by a median sternotomy. The UCI was attached to the apex. A 12-mm...

Objective: To design a new trileaflet aortic valve and investigate its mechanical behavior using finite element methods. Background: Quantification of aortic valve deformation during cardiac cycle is essential in understanding normal and pathological valvular function and eventually in the design of valves. We have designed and analyzed a new tissue valve model to investigate the mechanics of t...

We describe a system dedicated to the analysis of the complex threedimensional anatomy and dynamics of an abnormal heart mitral valve using three-dimensional echocardiography to characterize the valve pathophysiology. This system is intended to aid cardiothoracic surgeons in conducting preoperative surgical planning and in understanding the outcome of “virtual” mitral valve repairs. This paper ...

The size and function of mechanical heart valves were evaluated in this article. pathological cases that produce valve damage lead to the most well-known rheumatic illnesses have been investigated. They induce stenosis regurgitation valve, whether aortic or mitral, other diseases, such as degenerative, congenital, calcific valves. These occurred between 2015 2020, following are relevant charact...

PURPOSE Some investigators suggest that hemodynamic outcomes may be superior with the stentless aortic bioprosthesis when compared with a mechanical valve. The goal of this study was to characterize outcomes and hemodynamic data associated with each type of valve. SUBJECTS AND METHODS Patient outcomes and echocardiographic data were compared between 25 patients with stentless valves and 59 pa...

Phonocardiography is-often more valuable than electrocardiography in timing mechanical events in the cardiac cycle. This study shows that the opening and closing of the mitral valve are related to the length of the previous heart cycle as demonstrated by the variations occuring in aluricular fibrillation. These variations in valve action are controlled by the pressure gradient between left auri...

In recent decades, thromboembolic complications, ruptures, stenoses, and calcifications of the aortic heart valves cause morbidity and mortality of human patient. These complications need valvular replacement or correction with the natural valve, either mechanical or biological1. Implantation of the valve is necessary for the correction of the diseased human valve. These implanted valves may be...

BACKGROUND Oral anticoagulant therapy is effective for the prevention of arterial thromboembolism in various patient groups. The increased risk of hemorrhage remains the major drawback to this therapy and is associated with the intensity of anticoagulation. Finding the optimal intensity at which the overall incidence rate of both bleeding and thromboembolic events is minimized represents a way ...

BACKGROUND The indications for continuous oral anticoagulant treatment, the target interval and the procedures for withdrawing treatment have changed in the last 10 years. METHODS Patients on continuous oral anticoagulant treatment at the Outpatient Anticoagulant Clinic at Umeå University Hospital in 2002 were included in a descriptive study (n = 900). 263 of those had a mechanical heart valv...