“…4 Abnormal HRR and SBP recovery, as well as chronotropic incompetence, are risk factors for all-cause mortality. 5,9,10 In two large pharmacoepidemiological studies of stimulant medication use in adults, one did not find an increased risk of serious cardiovascular events, 12 but the other found an increased risk of both sudden death/ventricular arrhythmia and all-cause death. 2 …”