Journal of cardiac surgery
-
We report a 55-year-old man, the recipient of a cardiac allograft for ischemic cardiomyopathy 9 years earlier, who presented with progressive aortic root dilation, worsening aortic insufficiency, and an incidentally discovered chronic type A aortic dissection limited to the donor aorta. The patient was taken to the operating room, and the aortic dissection successfully repaired using standard reoperative techniques. This is the sixth case reported in the literature, and only the fourth survivor. To our knowledge, this case represents the first successful repair, of a limited aortic dissection of the donor aorta postcardiac transplantation, using a composite valve graft and modified-Cabrol coronary reconstruction.
-
Controlled Clinical Trial
Ischemic preconditioning by unstable angina reduces the release of CK-MB following CABG and stimulates left ventricular HSP-72 protein expression.
Whether the CK-MB reducing effect of ischemic preconditioning (IP) by unstable angina within 24 to 48 hours before CABG is achieved by early or by delayed preconditioning of left ventricular myocardium in humans is unknown. We investigated whether IP is associated with phosphorylation of p38 MAPK (characteristic for early preconditioning) or with increased protein expression of HSP-72 (characteristic for delayed preconditioning) at the time of CABG in patients. ⋯ Thus, in the human left ventricular myocardium there is a second window of protection lasting for at least 48 hours, while at that time the early phase of preconditioning has already gone.
-
The development of additional therapies for the treatment of pulmonary hypertension would be a significant advancement in the treatment of congenital heart disease. Recently, studies have found inhaled prostacyclin (PGI2) is an effective pulmonary vasodilator, comparable with nitric oxide. In this prospective interventional pilot study, we examined the physiologic effects of inhaled PGI2 in children with congenital heart disease and pulmonary hypertension. ⋯ Children with congenital heart disease and pulmonary hypertension may benefit from inhaled PGI2. Inhaled PGI2 reduced pulmonary blood pressures and improved oxygenation in this small study. PGI2 acts through cyclic adenosine monophosphate mediated pulmonary vasodilation, a mechanism different from nitric oxide. In children with inadequate response to nitric oxide, inhaled PGI2 may be a useful alternative pulmonary vasodilator.
-
Postoperative atrial fibrillation (AF) occurs in up to 50% of cardiac surgery patients and represents the most common postoperative arrhythmic complication. The etiology of AF after open-heart surgery is incompletely understood and its prevention remains suboptimal. Identification of patients vulnerable for postoperative AF would allow targeting of those most likely to benefit from aggressive prophylactic intervention. The aim of the present study was to evaluate clinical predictors of postoperative AF. ⋯ Postoperative AF remains the most common complication after cardiac surgery. A combination of advanced age and type of surgery identifies patients at high risk for development of AF after cardiac surgery.