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Electrocardiographic poor R wave progression. II: correlation with angiography
Insights
Electrocardiogram (ECG) findings of poor R wave progression (PRWP) or reversed R wave progression (RRWP) can help identify anterior myocardial infarctions (AMI). These ECG patterns are useful in diagnosing AMI, even in patients without Q waves.
Area of Science:
- Cardiology
- Diagnostic Electrocardiography
- Cardiac Imaging
Background:
- Poor R wave progression (PRWP) and reversed R wave progression (RRWP) on electrocardiograms (ECGs) are recognized abnormalities.
- The diagnostic utility of these ECG findings in specific cardiac conditions requires further elucidation.
- Distinguishing between various cardiac pathologies presenting with PRWP/RRWP is clinically significant.
Purpose of the Study:
- To evaluate the diagnostic accuracy of PRWP and RRWP on ECG for identifying anterior myocardial infarction (AMI).
- To assess the correlation of these ECG findings with angiographic and ventriculographic data in patients with valvular heart disease and AMI.
- To determine the clinical utility of PRWP/RRWP in differentiating AMI from other cardiac conditions.
Main Methods:
- Analysis of 40 patients with PRWP or RRWP on ECG who underwent coronary arteriography and left ventriculography.
- Patients were selected from cohorts with predominant mitral stenosis, aortic stenosis, or anterior myocardial infarction (AMI).
- Application of criteria derived from vectorcardiography (VCG) and inclusion of right precordial lead repolarization abnormalities.
Main Results:
- ECG criteria correctly diagnosed 85% (11/13) of angiographic AMIs.
- 56% (15/27) of patients without angiographic AMI but with PRWP/RRWP were identified, with a low false-negative rate for AMI (12%).
- Patients with PRWP/RRWP but without Q-wave AMI showed a trend towards less severe ventricular contraction abnormalities.
Conclusions:
- PRWP and RRWP on a 12-lead ECG are valuable indicators for diagnosing anterior myocardial infarction (AMI).
- These ECG findings aid in differentiating AMI from other conditions like valvular heart disease, with a low false-negative rate.
- PRWP/RRWP may indicate a less severe degree of ventricular dysfunction compared to Q-wave AMIs.
Abstract:
Forty patients with "poor R wave progression" (PRWP) or "reversed R wave progression" (RRWP) on the electrocardiogram (ECG) who underwent coronary arteriography and left ventriculography within one month of electrocardiographic recording were analyzed. Patients were randomly selected from a population of catheterization proven predominant mitral stenosis with elevated right ventricular pressures (presumed right ventricular hypertrophy), predominant aortic stenosis with increased left ventricular mass (left ventricular hypertrophy) and anterior myocardial infarction (AMI). Application of criteria previously derived from vectorcardiographic (VCG) correlative data, as well as inclusion of right precordial lead repolarization abnormalities, correctly diagnosed 85% (11/13) of angiographic AMIs. It is clinically useful to note that 56% (15/27) of patients with either PRWP or RRWP who did not exhibit angiographic AMI could be identified by 12 lead ECG with only 12% (2/17) false negative AMIs. In comparison with Q wave anterior myocardial infarctions, those with only PRWP or RRWP exhibited a trend toward a less severe degree of contraction abnormality on contrast ventriculography.