The Annals of thoracic surgery
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Comparative Study
Left ventricular pressure and volume unloading during pulsatile versus nonpulsatile left ventricular assist device support.
Nonpulsatile axial or centrifugal pumps are the latest generation of left ventricular assist devices (LVAD). Whether left ventricular (LV) unloading and outcome in these devices is similar to pulsatile LVADs during long-term support has not been investigated. We compared LV unloading and mortality between different types of LVAD support (pulsatile versus nonpulsatile). ⋯ Left ventricular pressure unloading is similar in patients with nonpulsatile as compared with pulsatile implantable long-term assist devices. Left ventricular volume unloading is pronounced in pulsatile LVADs.
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Patients receiving chemotherapy for lung cancer usually modify their lung function during treatment with increases in forced expiratory volume in 1 second (FEV(1)) and forced vital capacity (FVC) and decreases in lung diffusion for carbon monoxide (DLCO). This prospective study was designed to evaluate functional changes in forced expiratory volume in 1 second, forced vital capacity, and DLCO after three courses of induction chemotherapy with cisplatinum and gemcitabine in stage IIIa lung cancer patients and to assess their impact on respiratory complications after lung resection. ⋯ In lung cancer patients, forced expiratory volume in 1 second and forced vital capacity assessed after neoadjuvant chemotherapy are not reliable indicators of the likelihood of respiratory complications after surgery. The risk of respiratory complication may be directly linked to loss of DLCO/Va. Lung diffusion for carbon monoxide assessed after neoadjuvant chemotherapy is probably the most sensitive risk indicator of respiratory complications after surgery. We recommend that DLCO studies be performed before and after chemotherapy in lung cancer patients undergoing induction therapy.
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Postcardiotomy cardiogenic shock occurs in approximately 1% of patients. We prospectively evaluated the early and long-term outcome as well as predictors of survival when using temporary extracorporeal membrane oxygenation (ECMO) support. ⋯ Extracorporeal membrane oxygenation is an acceptable technique for short-term treatment of refractory postoperative low cardiac output. It can save the lives of a group of very high risk patients.
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Case Reports
Iatrogenic iliac artery rupture and type a dissection after endovascular repair of type B aortic dissection.
We report a case of two iatrogenic complications after endovascular repair of a type B aortic dissection treated for abdominal aortic branch ischemia. A rupture of the common iliac artery occurred first during the procedure. ⋯ The proximal part of the aortic endovascular graft had created a tear in the aortic wall resulting in a retrograde type A dissection. Although aortic endovascular grafting is apparently associated with less morbidity and mortality, potentially lethal complications, both acute and delayed, may arise.
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Some patients with univentricular hearts who are candidates for Fontan operation may develop ventricular outflow tract obstruction after pulmonary artery banding (PAB) or Fontan. However, the indication for Damus-Kaye-Stansel (DKS) operation for these patients has not been clear. To clarify the indication, the changes in the diameter of ventricular outflow tract and the feasibility of DKS operation before or with Fontan were investigated. ⋯ The diameter of the ventricular outflow tract decreased after PAB and Fontan operations. DKS operations might be indicated before Fontan if the indexed diameter of ventricular outflow tract after PAB was below 70% and concomitantly with Fontan if it was below 120%.