Intraoperative imaging to detect coronary stenosis in no-angiography patients.

Sometimes, patients scheduled for cardiac operations other than coronary artery bypass may be unsuitable for preoperative coronary angiography. We routinely use intraoperative high-resolution epicardial ultrasound to select the proper target for the graft and to check graft anastomosis integrity. We describe 3 patients who could not undergo preoperative coronary angiography for different reasons. In all cases, we discovered significant stenosis in the left anterior descending coronary artery, which required bypass grafting. Intraoperative verification by transit-time flow measurements confirmed the significant stenosis detected by imaging.

Parallel improvement of left ventricular geometry and filling pressure after transcatheter aortic valve implantation in high risk aortic stenosis: comparison with major prosthetic surgery by standard echo Doppler evaluation.

PURPOSE: The effect of Transcatheter Aortic Valve Implantation (TAVI) on left ventricular (LV) geometry and function was compared to traditional aortic replacement (AVR) by major surgery. METHODS: 45 patients with aortic stenosis (AS) undergoing TAVI and 33 AVR were assessed by standard echo Doppler the day before and 2 months after the implantation. 2D echocardiograms were performed to measure left ventricular (LV) mass index (LVMi), relative wall thickness (RWT), ejection fraction (EF) and the ratio between transmitral E velocity and early diastolic velocity of mitral annulus (E/e' ratio). Valvular-arterial impedance (Zva) was also calculated. RESULTS: At baseline, the 2 groups were comparable for blood pressure, heart rate, body mass index mean transvalvular gradient and aortic valve area. TAVI patients were older (p<0.0001) and had greater LVMi (p<0.005) than AVR group. After 2 months, both the procedures induced a significant reduction of transvalvular gradient and Zva but the decrease of LVMi and RWT was significant greater after TAVI (both p<0.0001). E/e' ratio and EF were significantly improved after both the procedure but E/e' reduction was greater after TAVI (p<0.0001). TAVI exhibited greater percent reduction in mean transvalvular gradient (p<0.05), Zva (p<0.02), LVMi (p<0.0001), RWT (p<0.0001) and E/e' ratio (p<0.0001) than AVR patients. Reduction of E/e' ratio was positively related with reduction of RWT (r = 0.46, p<0.002) only in TAVI group, even after adjusting for age and percent reduction of Zva (r =0.43, p<0.005). CONCLUSIONS: TAVI induces a greater improvement of estimated LV filling pressure in comparison with major prosthetic surgery, due to more pronounced recovery of LV geometry, independent on age and changes of hemodynamic load.

New access to facilitate endovascular repair of descending aorta aneurysms.

Coexisting arterial diseases and endoprosthesis to peripheral-vessel mismatch may impair conventional femoral access for endovascular treatment of descending aorta aneurysms. Furthermore, previous abdominal operations can make an optional aortic-iliac approach more difficult. We introduced a new minimally invasive access through the aortic arch, which completely avoids the aortic-iliac access and minimizes surgical trauma.

A cosmetic access for minimally invasive aortic valve replacement without sternotomy in women.

BACKGROUND: Different methods of replacing the aortic valve via a minimally invasive access have been reported in the recent literature. Although these strategies have clear advantages in terms of reduced surgical trauma, no further refinements in terms of cosmetic results have been made for women. METHODS: Aortic valve replacement was performed in 4 women via a right anterior submammary minithoracotomy without rib resection. The incision was made along the breast fold. The extracorporeal circulation was connected through the same access. Standard surgical technique and equipment were employed. RESULTS: No intraoperative complications or hospital deaths occurred. The 4 patients could be discharged home on the sixth postoperative day. The cosmetic result was excellent and the wound completely disappeared within the breast fold. CONCLUSIONS: The advantages of the present method include the preservation of sternal integrity, early mobilization and rehabilitation and an excellent cosmetic result for women.

Coronary ostial stenosis after aortic valve replacement.

Coronary ostial stenosis is a life-threatening complication of aortic valve replacement. We describe the case of a patient who developed symptoms and signs related to coronary insufficiency 4 months after aortic valve replacement. In view of a coronary angiogram revealing a 99% left main stem stenosis, an urgent revascularization procedure was performed. Intraoperative inspection revealed a dense fibrous reaction of the aortic root involving the left coronary ostium. The postoperative course was uneventful and since the operation the patient remained asymptomatic. The possible mechanisms involved in the pathogenesis of coronary ostial stenosis after aortic valve replacement and the surgical strategy to be employed for the treatment of this complication are discussed.