Electrocardiographic poor R wave progression. II: correlation with angiography

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.