<prompt> Which of the following ECG changes is least likely in a patient with left pneumothorax-iMSInversion of TwaveLeft axis detionSmall R waveElectrical altemans  <response>: Abnormal left axis detion was found with left-sided was pneumothorax .Relevant QRS abnormalities incomplete RBBB and T-wave inversionin 10. QRS amplitude in V2-V6 leads was significantly decreased in left-sided pneumothorax. Ref Harrison 20th edition pg 1536 