“…42 Sinus tachycardia has also been found to be more common in patients with RV enlargement than those without (29% vs 18%, P = 0.02). 19 Furthermore, sinus tachycardia may be more common in patients with acute PE than chronic PE (74% vs 51%, P = 0007), 45 as well as in pulmonary trunk embolism than peripheral embolism (100% vs 30%), though statistical significance was not calculated for the latter. 46 In terms of prognostication, sinus tachycardia has been shown to be more prevalent in patients with massive PE than nonmassive PE in one study (36% vs 0%), 37 but this finding was not replicated by Bircan et al 42 While some studies have shown that patients with sinus tachycardia are at increased risk of in-hospital complications (88% vs 19%, P = 0.0003; 65% vs 38%, P < 0.05) 38,41 and in-hospital death (91% vs 37%, P < 0.001), 41 several studies have found no significant association with either, 23,38,45 , nor with degree of cardiac biomarker elevation.…”