<prompt> Tall R wave in ECG represents:Right atrial overloadLeft atrial overloadRight ventricular hypertrophyAll of the above  <response>: Right ventricular hypertrophy due to a sustained, severe pressure load e.g. due to right pulmonary valve stenosis or certain pulmonary artery hypertension syndromes is characterized by a relatively tall R wave in lead V, R S wave, usually with right axis deviation. 