Impact of progressive sinotubular junction dilatation on valve competence of the 3F Aortic and Sorin Solo stentless bioprosthetic heart valves.

Objective: The use of stentless bioprostheses for aortic valve replacement provides excellent haemodynamics; however, these valves bear the potential risk of progressive regurgitation over time. To overcome this disadvantage, a new generation of pericardial stentless prostheses has been developed. This study aims to assess the tolerance of such bioprotheses against progressive sinotubular junction dilatation.

Strategies for the reduction of cerebral microembolism during transmyocardial laser revascularization.

Background And Objectives: During transmyocardial laser revascularization (TMLR), multiple microembolic signals (MES) can be detected in cerebral arteries. We sought to characterize composition and clinical relevance of these MES and to evaluate strategies to reduce cerebral microembolization during TMLR.

Study Design/materials And Methods: TMLR was performed in pigs.

High incidence of sudden death late after anterior LV-aneurysm repair.

Objectives: Sudden death due to ventricular arrhythmias occurs frequently among patients with dilated cardiomyopathy and congestive heart failure (CHF). In patients with left ventricular (LV) aneurysms, LV-aneurysm repair (LVAR) reduces LV-size and ameliorates symptoms of CHF, but the incidence of late sudden death is unknown, especially after LVAR without concomitant anti-arrhythmic therapy.

Methods: Between June 1993 and June 1999, 147 patients (70% males; 62+/-9 years) with CHF (median: NYHA III) due to anterior LV-aneurysms underwent LVAR.

Results of endoaneurysmorrhaphy: does the location of the aneurysm matter?

Endoaneurysmorrhaphy is mostly performed on anterior-septal left ventricular (LV) aneurysms. It may also be applied to posterior aneurysms, which is technically more challenging. Whether the surgical risk is the same, irrespective of the location of the aneurysm, has not been studied before.

Up to 7 years' experience with valve-sparing aortic root remodeling/reimplantation for acute type A dissection.

Background: Aortic valve-sparing operations for acute type A dissection are appealing and innovative but less well defined surgical techniques requiring further evaluation.

Methods: We reviewed all consecutive patients with acute type A dissection who underwent either the remodeling (group 1, n = 21) or the reimplantation valve-sparing technique (group 2, n = 15) since October 1994. Patients were followed up clinically and echocardiographically for as long as 41.

Lung protection during total cardiopulmonary bypass by isolated lung perfusion: preliminary results of a novel perfusion strategy.

Background: The present pilot study was conducted to evaluate the effect of isolated short-term lung perfusion during cardiopulmonary bypass (CPB) on inflammatory response and oxygenation.

Methods: A total of 24 patients undergoing elective cardiac surgery with routine CPB were prospectively assigned to three groups. Group I (n = 7), control subjects receiving neither lung perfusion nor ultrafiltration; group II (n = 9), patients undergoing lung perfusion; and group III (n = 8), patients undergoing lung perfusion plus ultrafiltration.