[Recovery of left ventricular wall motion in early periods by successful reperfusion following myocardial infarction].
To study the time course and recovery of left ventricular (LV) function after reperfusion therapy (PTCR or PTCA), we recorded 2 D E in 1, 3, 5, 7, 14, 28 days following myocardial infarction in 41 cases with complete occlusion of left anterior descending artery. LV volumes and regional wall motion were analyzed by the centerline method (100 chords) between a reperfused (R) and a non-R group. LV end-diastolic volumes of R increased from 3 to 7 days were smaller than those in non-R. LV end-systolic volume of R decreased during the same periods were also smaller than those of non-R. Besides global ejection fractions of R were larger significantly (p less than 0.05) than those of non-R. Moreover mean percent fractional shortening of infarct-related chords from anteroseptum (-15) to lateral wall (61-80) in R improved more than those in non-R. In conclusion, LV function following myocardial infarction can be assessed by quantitative 2D echo and improved early, and become constant 7 days after successful reperfusion therapy.
Kadowaki
K
K
Division of Cardiology, Akita Medical Center.
Nakagomi
A
A
Sato
T
T
Abe
Y
Y
Kumagai
T
T
D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy; D015425:Myocardial Reperfusion; D013318:Stroke Volume; D013997:Time Factors; D016277:Ventricular Function, Left