<prompt> Identity the true statement about Pulmonary embolism:S1 Q3 T3 is the most common ECG finding seenThere will be Left axis deviationD-dimer is the gold standard investigationSinus tachycardia is most common finding on ECG  <response>: S1 Q3 T3 is highly predictive sign but not the most common ECG finding. And there will be right axis deviation.D-Dimer is best for screening not gold standard investigation. 