Triple-site pacing: a new supported therapy approach for bridge to recovery with a left ventricular assist system in a patient with idiopathic dilated cardiomyopathy.
Left ventricular assist devices (LVAD) are widely used as bridges to cardiac transplantation or for destination therapy. LVAD support may also function as a bridge to ventricular recovery, but a sufficient rate of recovery has not been obtained, even with various adjuvant therapies. Cardiac resynchronization therapy (CRT) is an effective treatment for heart failure, and there is a report of successful weaning off LVAD with CRT. However, some patients with CRT could not improve their cardiac function because of residual dyssynchrony. Herein, we describe a case of a successful bridge to recovery with triple-site pacing for residual dyssynchrony after biventricular pacing. A 34-year-old woman with heart failure due to dilated cardiomyopathy whose condition deteriorated underwent Toyobo LVAD implantation, resulting in improvement of the left ventricular ejection fraction (LVEF) from 12 to 36%. Because of left ventricular dyssynchrony, we performed CRT, but residual dyssynchrony impeded cardiac recovery. We inserted an additional ventricular lead at the right ventricular outlet to achieve triple-site pacing in order to obtain complete synchronization. The LVEF improved to 45%, and the patient was successfully weaned off the LVAD. In LVAD-supported cases of persistent left ventricular dyssynchrony with CRT, implantation of triple-site pacing could potentially accelerate recovery.
Nishimura
Takashi
T
Division of Therapeutic Strategy for Heart Failure, Department of Cardiothoracic Surgery, The University of Tokyo Hospital, Bunkyo-ku, Tokyo, Japan. takashin-tky@umin.ac.jp
Kyo
Shunei
S
D000328:Adult; D002304:Cardiac Pacing, Artificial; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D006333:Heart Failure / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery; D006353:Heart-Assist Devices; D006801:Humans; D013318:Stroke Volume / Q000502:physiology; D016896:Treatment Outcome; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging / Q000601:surgery