A Study on the Implantation of a Left Ventricular Epicardial Lead during CABG in Patients with Low Cardiac Function

(Cardiovascular Surgery, Ayase Heart Hospital, Tokyo, Japan)

Makoto Taoka Eiichi Tei Imun Tei
Atsushi Fukumoto Kazuki Satoh
In 306 patients who underwent elective coronary artery bypass graft(CABG)between January 2005 and July 2008, low cardiac functions(EF<35%)were seen in 24 patients. Of these, 7(EF, 22.7±5.4%, NYHA 3.4±0.4)had a left ventricular epicardial lead implanted during surgery. On completion of bypass anastomosis, a screw-in-type epicardial lead was implanted. The mean threshold at implantation was satisfactory(1.1±0.4V). There were no complications related to intraoperative lead placement. In the aforementioned 7 patients, combined Cardiac resynchronization therapy defibrillator(CRT-D)implantation was performed in 4 during the postoperative period while they were still in the hospital. In 1 other patient, the procedure was conducted when he was readmitted for heart failure 3 months after discharge. The threshold for the left ventricular myocardial lead was satisfactory(1.0±0.1V). No postoperative complications, such as infections, hemorrhage, or twitching, were noted. For those patients who are likely to have a CRT-D placed after CABG, a left ventricular lead showed be implanted if possible for the safe and fast postoperative placemens of a defibrillator. However, the indications of myocardial lead implantation must be considered carefully.
  Jpn. J. Cardiovasc. Surg. 39:285-288(2010)

Keywords:low cardiac function, coronary artery bypass grafting, cardiac resynchronization therapy