PULMONARY DISEASE PATTERN:
ECG changes commonly associated with pulmonary diseases such as COPD. ECG findings often suggest right ventricular pressure overload or strain.
•Common ECG findings:
•Right axis deviation or vertical axis of the QRS complex.
•Right axis deviation of the P waves.
•Prominent P waves in the inferior leads (right atrial abnormality).
•Late transition (clockwise rotation).
•Persistent S waves in lead V6.
•Absence of R waves in leads V1 through V3 (SV1, SV2, SV3 pattern).
•PR and ST segment sagging (exaggerated atrial depolarization).
•Low QRS voltage (especially in the precordial leads).