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Eur J Cardiothorac Surg 2002;22:249-254
© 2002 Elsevier Science NL
a Department of Cardio-vascular Surgery, Centre Hospitalier Universitaire Vaudois (CHUV), CH-1011 Lausanne, Switzerland
b Department of Anesthesiology, Centre Hospitalier Universitaire Vaudois (CHUV), CH-1011 Lausanne, Switzerland
Received 6 February 2002; received in revised form 12 April 2002; accepted 1 May 2002.
* Corresponding author. Tel.: +41-21-314-2313; fax: +41-21-314-2278
e-mail: xavier.mueller{at}chuv.hospvd.ch
Objective: Heart manipulation during OPCAB may cause hemodynamical instability in particular for access to the posterior and lateral walls. The ‘no compression’ technique involves enucleation of the heart without any compression on the cavities, and stabilization of the target area with a suction device. The impact of this technique on hemodynamics is assessed. Methods: In order to analyze a homogeneous group, 26 consecutive patients with triple grafts, one to each side of the heart in the same sequential order (posterior, lateral and anterior wall successively) were selected. Heart rate (HR), mean pulmonary arterial pressure (PAP, mmHg), pulmonary capillary wedge pressure (PCWP, mmHg), mean arterial pressure (MAP, mmHg), cardiac output index (COI, l/min per m2), and central venous saturation (SvO2,%) were monitored. A coronary shunt was used for all the anastomoses. Results: HR was stable with baseline value of 60±10 and the highest value for the anterior wall, 63.6±8 (P=0.23). PAP and PCWP exhibited their highest increase, when compared with baseline, for the lateral wall, 23.9±4.7 vs. 20.7±6.2 (P=0.06), and 17.2±4.7 vs. 14.9±5.6 (P=0.16), respectively. MAP, COI and SvO2, exhibited their largest drop, when compared with baseline, for the lateral wall too, 73.1±9.1 vs. 77.1±7.5 (P=0.12), 1.99±0.47 vs. 2.26±0.55 (P=0.09), and 70.5±8.4 vs. 74.8±9.3 (P=0.12), respectively. Conclusions: None of the hemodynamical parameter differed significantly from baseline value for all three territories. While hemodynamics was perfectly maintained during the posterior and anterior walls revascularization, exposure of the lateral wall led to marginal changes only.
Key Words: Off-pump • Coronary artery bypass • Hemodynamics
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