Myocardial recovery after cardiac surgery: A study of hemodynamic performance and electrophysiology during the first 18 postoperative hours

✍ Scribed by Wesslén, Örjan; Linden, Jan van der; Ekroth, Rolf; Joachimsson, Per-Olof; Nordgren, Lars; Nyström, Sven-Olov

• Book ID: 104348003
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 590 KB
• Volume: 4
• Category: Article
• ISSN: 0888-6296
• DOI: 10.1016/s0888-6296(09)90003-5

✦ Synopsis

Hemodynamic and vectorcardiographic variables were monitored in 23 patients with acquired heart disease. before and during the first 18 postoperative hours of cardiac surgery. The hemodynamic pattern directly after surgery was characterized by left ventricular depression and increased heart rate. Thus. stroke volume index had decreased from the preoperative 29 ± 1 to 24 ± 1 mL/beat/m 2 • and heart rate had increased from 61 ± 2 to 94 ± 4 beats/min. During the following hours a gradual normalization of stroke volume occurred. leading to a cardiac index that was adequate after 8 to 10 hours. judging from the mixed venous oxygen saturation (68% ± 1%). Fourteen patients had an uneventful postoperative course. with no signs of acute myocardial infarction. and did not require inotropic support. These patients had small but consistent vectorcardio-I N THE IMMEDIATE period after cardiac surgery there are often signs of myocardial dysfunction in terms of hemodynamic performance and electrophysiology. However, there is still considerable controversy about how to accurately diagnose a perioperative myocardial infarction (MI) after cardiac surgery. In the present study, hemodynamic and electrophysiological