S1Q3T3 pattern on ECG

S1Q3T3 pattern
S1Q3T3 pattern

S1Q3T3 pattern in ECG is seen in acute pulmonary embolism. The commonest ECG finding in acute pulmonary embolism is sinus tachycardia, which is noted in this ECG as well. T wave inversion in anterior leads is another finding in pulmonary embolism. Incomplete right bundle branch block pattern can also be a manifestation sometimes noted in pulmonary embolism. Similar electrocardiographic findings can also occur in other causes of acute cor pulmonale with right ventricular overload.