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Echocardiographic demonstration of improved myocardial function early after coronary artery bypass graft surgery.
- Source :
-
Interactive cardiovascular and thoracic surgery [Interact Cardiovasc Thorac Surg] 2011 Jun; Vol. 12 (6), pp. 946-51. Date of Electronic Publication: 2011 Mar 21. - Publication Year :
- 2011
-
Abstract
- The time course of recovery of left ventricular (LV) function after coronary artery bypass grafting (CABG) surgery is largely unknown. We aimed to test the hypothesis that LV function improves shortly after CABG by using echocardiography to elucidate myocardial contractility before and after CABG, and to determine the segmental distribution of viable myocardium. We prospectively studied 42 patients undergoing elective isolated CABG. No selection was done regarding preoperative LV ejection fraction. All patients underwent serial transthoracic two-dimensional echocardiography preoperatively, and at two to four days and six to seven weeks postoperatively. Regional wall motion was evaluated at each examination, and wall motion score index (WMSI) was calculated to assess recovery of contractile function. WMSI improved by surgery (P=0.005), stepwise from preoperatively to two to four days postoperatively (P=0.05) and borderline significantly between the two postoperative examinations (P=0.06). One hundred and one (15%) of 670 segments had abnormal contraction preoperatively; of which 69 were hypokinetic and 32 were akinetic. At six to seven weeks postoperatively a normalization of function was found in 35 (51%) hypokinetic and four (13%) akinetic segments. Our data suggest that CABG improves myocardial contractility within the first days postoperatively. Echocardiographic determination of wall motion is a useful tool to observe LV function.
- Subjects :
- Aged
Female
Heart Ventricles physiopathology
Humans
Male
Middle Aged
Norway
Predictive Value of Tests
Prospective Studies
Recovery of Function
Stroke Volume
Time Factors
Treatment Outcome
Ultrasonography
Coronary Artery Bypass
Heart Ventricles diagnostic imaging
Myocardial Contraction
Ventricular Function, Left
Subjects
Details
- Language :
- English
- ISSN :
- 1569-9285
- Volume :
- 12
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Interactive cardiovascular and thoracic surgery
- Publication Type :
- Academic Journal
- Accession number :
- 21422155
- Full Text :
- https://doi.org/10.1510/icvts.2010.260414