Related Experiment Videos
Risk stratification for restenosis after coronary angioplasty by means of exercise echocardiography
Insights
Exercise echocardiography effectively predicts outcomes after coronary angioplasty. A higher wall motion index post-procedure indicates a better clinical course, surpassing stress ECG in predictive accuracy.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Interventional Cardiology
Background:
- Coronary angioplasty (PTCA) is a common procedure for coronary artery disease.
- Assessing the long-term success and patient prognosis after PTCA is crucial.
- Non-invasive methods are needed to evaluate the functional significance of coronary stenosis and PTCA outcomes.
Purpose of the Study:
- To evaluate the prognostic value of exercise two-dimensional echocardiography (stress echocardiography) in patients after elective coronary angioplasty.
- To correlate stress echocardiography findings with clinical outcomes and restenosis rates.
- To compare the diagnostic performance of stress echocardiography with stress electrocardiography (ECG).
Main Methods:
- Sixty patients (mean age 61) undergoing successful PTCA were enrolled.
- Patients underwent stress echocardiography using treadmill or bicycle ergometry.
- Wall motion index (WMI) was assessed at rest and peak stress, categorizing patients into three groups based on WMI values.
Main Results:
- A significant linear correlation (p=0.001) was found between post-angioplasty WMI and clinical course.
- Patients with abnormal WMI indicating stress-induced ischemia (Group 3) had higher rates of restenosis or progressive disease requiring repeat PTCA.
- Stress echocardiography demonstrated superior negative predictive value (88% vs. 77%) and positive predictive value (73% vs. 50%) compared to stress ECG.
Conclusions:
- Exercise echocardiography is a valuable tool for predicting the clinical course and restenosis after coronary angioplasty.
- Post-angioplasty WMI is a significant predictor of long-term outcomes.
- Stress echocardiography offers improved prognostic accuracy over stress ECG in this patient population.
Abstract:
To assess the prognostic contribution of exercise two-dimensional echocardiography in patients undergoing elective coronary angioplasty, 60 patients (44 males, 16 females, mean age 61 years) were enrolled in this study. The series included 31 patients with single-vessel disease, 23 with two vessel, and 5 with three vessel disease. After successful PTCA, they underwent stress echocardiographic testing either by treadmill (n = 23) or bicycle ergometry (n = 37), performed with digital continuous loop technique. A wall motion index (WMI) was calculated at rest and at peak stress. According to WMI values, the study population was divided into three groups: patients with normal WMI both at rest and stress (Group 1); patients with abnormal baseline WMI without change at stress (Group 2) and abnormal WMI diagnostic of stress-induced ischemia (Group 3). During the follow-up period, minimum of 1 year, 21 patients complaining of recurrent angina or chest discomfort, had repeat angiography: in 13 of these, typical restenosis of a previously dilated artery was found; 2 patients had progression of atherosclerotic plaque and in 6 the angiogram showed a good result of PTCA. Thirteen patients with restenosis or progressive disease underwent repeat PTCA. In this group, only 2 belonged to Group 1, 4 to Group 2, and 7 to Group 3. Thus, a linear correlation between the WMI value post-angioplasty and the clinical course could be documented (p = 0.001). Stress echocardiography was superior to stress ECG in both negative predictive value (88 and 77% respectively) and positive predictive value (73 versus 50%).(ABSTRACT TRUNCATED AT 250 WORDS)