[Relationship between myocardial viability and ventricular late potentials in patients with history of myocardial infarction].
OBJECTIVE
To study relationship between presence and volume of viable myocardium and registration of late ventricular potentials in patients with history of myocardial infarction.


METHODS
High resolution ECG, dobutamine stress echocardiography and Holter ECG monitoring were carried out 34 patients (mean age 54.1-/+3.1 years) with history of documented myocardial infarction.


RESULTS
According to data of dobutamine stress echo patients were divided into 2 groups: with irreversible myocardial dysfunction (n=16, group 1) and with hibernating myocardium (n=18, group 2). Ventricular late potentials were registered in 3 (18.7%) and 11 (61,1%) patients in groups 1 and 2, respectively. Group 2 patients more often had high-grade ventricular arrhythmias. There was no association between presence of ventricular late potentials and Lown grade of ventricular arrhythmias on Holter ECG. Duration of filtered QRS (QRSt) complex correlated directly with index of regional wall motion abnormality, end-diastolic volume, and negatively - with total ejection fraction.


CONCLUSIONS
Among myocardial infarction survivors patients in whom dobutamine stress echo detects viable myocardium significantly more often have ventricular late potentials and high grade ventricular arrhythmias compared with patients with myocardial scars without viable myocardium.
Buziashvili
Iu I
IuI
Khananashvili
E M
EM
Asymbekova
E U
EU
Shuvaev
I P
IP
Aripov
M A
MA
Dzhandzhgava
D A
DA
Shmarina
T I
TI
Pansha
M O
MO
D000328:Adult; D001145:Arrhythmias, Cardiac / Q000209:etiology / Q000503:physiopathology; D002470:Cell Survival; D025401:Echocardiography, Stress; D004562:Electrocardiography; D006321:Heart / Q000502:physiology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008564:Membrane Potentials; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D009206:Myocardium; D011237:Predictive Value of Tests; D020257:Ventricular Remodeling