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| PROGNOSTIC
VALUE OF DOBUTAMINE STRESS ECHOCARDIOGRAPHY IN PATIENTS SCHEDULED
FOR VASCULAR SURGERY, 30 MONTHS FOLLOW UP STUDY |
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Lj. Mangovski, A. Nešković, R. Babić, D. Maraš, M. Mirić and
B. Đukanović |
| Dedinje
Cardiovascular Institute, Belgrade, Yugoslavia |
The aim of
this study was to assess the long-term prognostic value of dobutamine
stress echocardiography (DES) for new coronary events in patients
who underwent vascular surgery procedures. Methods: We evaluated
50 consecutive patients (pts) scheduled for elective vascular
surgery. All pts had EF>30%. Pts with unstable angina were excluded
from the study. DES was performed using the high dose dobutamine
protocol. Positive DES was determined as new wall motion abnormality
or worsening of preexisting wall motion disinergy. According to
the outcome of DSE pts were divided into 2 groups: Group 1, pts
with positive DES (29/50 pts. 58%) and Group 2 which represented
pts with negative DSE (21/50 pts, 42%). All patients were followed
for 30 months after vascular procedure. The incidence of cardiac
events, fatal and non-fatal myocardial infarction (MI), and need
for PTCA and CABG were followed and compared with the results
of the DSE test parameters. Results: During follow up period in
group 1, 12/29 (41,4%) pts had new coronary events comparing to
group 2 without new coronary events (p<0,05). Also, incidence
of fatal (1/29, 3.4%) and non-fatal MI (3/29, 10,3%) was higher
in group 1. (4/29 vs. 0/21). 4/29 pts (13.8%) from group 1 underwent
CABG and 2/29 pts (6.8%) had PTCA. Mean time from positive DSE
to new coronary event was 13+/- 8.6 months. Univariate regression
analysis shown that ESV peak (p=0,047) and presence of ST depression
>2 mm during DSE (p=o,023) are strong predictors of new coronary
events. Also, DSE outcome can strongly predict survival of these
patients. Conclusion: Positive DSE in patients scheduled for vascular
surgery is associated with increased incidence of new coronary
events and lower survival during long-term follow-up. Presence
of increased ESV and ST depression > 2mm can strongly predict
these events.
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