title: Evolution of right ventricular performance after CABG.
abstract: 34 patients scheduled for coronary artery bypass graft (CABG) surgery were studied during postoperative period. Right ventricular performance was specially performed with use of cardiac output computer REF-1 Edwards Lab., before Anaesthesia (T1) and at 6 investigation times after surgery during and after mechanical ventilation. The sixth first postoperative hours were marked by a decrease of cardiac index (2.56 +/- 0.4 to 2.41 +/- 0.41.mn-1.m2) and right Ventricular Ejection Fraction (RVEF) (0.48 +/- 0.07 to 0.37 +/- 0.09). The second period was the weaning period with a further drop of RVEF (0.43 +/- 0.1 to 0.36 +/- 0.07) without change in cardiac index (2.80 +/- 0.51.mn-1.m2, suggesting a ventricular post-operative and weaning depression, as previously described for the left ventricle. In addition, postoperative tachycardia (Heart rate = 59 +/- 9 at T1 to 95 +/- 14 at T7) may contribute to myocardial ischemia.
authors.affiliation: Département d'Anesthésie Réanimation, Hôpital Cardiovasculaire et Pneumologique L. Pradel, Lyon, France.
authors.forename: O
authors.initials: O
authors.lastname: Bastien
authors.forename: P G
authors.initials: PG
authors.lastname: Durand
authors.forename: M
authors.initials: M
authors.lastname: George
authors.forename: A
authors.initials: A
authors.lastname: Gurbala
authors.forename: S
authors.initials: S
authors.lastname: Estanove
mesh_terms: D000368:Aged; D002302:Cardiac Output; D001026:Coronary Artery Bypass; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D011184:Postoperative Period; D013318:Stroke Volume; D014655:Vascular Resistance