Abstract:
:To evaluate whether the response of left ventricular pump function during low-level exercise in the early postinfarction period can anticipate its change during the first year after acute myocardial infarction (MI), global and regional ejection fractions (EF) were investigated using radionuclide angiography in 52 consecutive patients with negative predischarge exercise test. The changes in left ventricular EF and regional EF of the noninfarcted area during the early exercise test had a good linear relation with the changes during the first year after MI (r = 0.86, p less than 0.001 and r = 0.81, p less than 0.001, respectively). Our results indicate that the mobilization of the Frank-Starling mechanism and myocardial contractility were the important factors related to the change of left ventricular EF, and that the changes of left ventricular EF during exercise in the patient with a negative predischarge exercise test can predict the direction of change (concordant rise or fall) during the first year after MI.
journal_name
Chestjournal_title
Chestauthors
Iwasaka T,Sugiura T,Nakamura S,Okubo N,Inada Mdoi
10.1378/chest.102.2.335subject
Has Abstractpub_date
1992-08-01 00:00:00pages
335-40issue
2eissn
0012-3692issn
1931-3543pii
S0012-3692(16)34021-1journal_volume
102pub_type
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