In left sided massive pneumothorax, ECG shows all, except-
Abnormal left axis detion in left-sided pneumothorax. Relevant QRS abnormalities (incomplete RBBB and T-wave inversion) in(10%). QRS amplitude in V2-V6 leads was significantly decreased in left-sided pneumothorax. Ref Harrison 20th edition pg 1546
Left axis detion
Absent R wave
Peaked P wave
Precordial T wave inversion
C.V.S