摘要
Background: Transcatheter Aortic Valve Replacement (TAVR) is a new minimally-invasive surgical procedure in which a bioprosthetic aortic valve is placed via a small skin incision in the groin, over either the left or right iliac artery. TAVR was recently approved by the FDA as a treatment option for aortic stenosis in patients who may be too frail to undergo open heart surgery. Anesthetic management of TAVR is complicated by the fact that rapid left ventricular pacing (to at least 180 beats per minute) is required at multiple points throughout the procedure. Aim: This rapid pacing creates a profound pathophysiologic stress on the heart, sometimes leading to severe left ventricular dysfunction and resultant complete hemodynamic collapse. We report that the use of prophylactic infusion of epinephrine and/or norepinephrine in patients undergoing TAVR results in improved recovery from rapid pacing as reflected by intraoperative trends in systolic systemic blood pressure and systolic pulmonary arterial pressure. Cases: Here we report three cases. During the first of these, we reacted to intraoperative hemodynamic changes by administering boluses of vasoactive medications as needed. During the other two cases, we preemptively infused vasopressors to facilitate a more rapid recovery from some of the hemodynamic disturbance associated with either TAVR or rapid pacing. Conclusion: The two patients in this series who were managed with a preemptive strategy had higher ratios of systemic systolic blood pressure to pulmonary arterial systolic blood pressure at the end of the case than did the patient who was managed reactively. This suggests that the preemptive strategy may lead to decreased left ventricular impairment and improved overall cardiac function after TAVR.
Background: Transcatheter Aortic Valve Replacement (TAVR) is a new minimally-invasive surgical procedure in which a bioprosthetic aortic valve is placed via a small skin incision in the groin, over either the left or right iliac artery. TAVR was recently approved by the FDA as a treatment option for aortic stenosis in patients who may be too frail to undergo open heart surgery. Anesthetic management of TAVR is complicated by the fact that rapid left ventricular pacing (to at least 180 beats per minute) is required at multiple points throughout the procedure. Aim: This rapid pacing creates a profound pathophysiologic stress on the heart, sometimes leading to severe left ventricular dysfunction and resultant complete hemodynamic collapse. We report that the use of prophylactic infusion of epinephrine and/or norepinephrine in patients undergoing TAVR results in improved recovery from rapid pacing as reflected by intraoperative trends in systolic systemic blood pressure and systolic pulmonary arterial pressure. Cases: Here we report three cases. During the first of these, we reacted to intraoperative hemodynamic changes by administering boluses of vasoactive medications as needed. During the other two cases, we preemptively infused vasopressors to facilitate a more rapid recovery from some of the hemodynamic disturbance associated with either TAVR or rapid pacing. Conclusion: The two patients in this series who were managed with a preemptive strategy had higher ratios of systemic systolic blood pressure to pulmonary arterial systolic blood pressure at the end of the case than did the patient who was managed reactively. This suggests that the preemptive strategy may lead to decreased left ventricular impairment and improved overall cardiac function after TAVR.
