Myocardial infarction detected by a smartwatch after transcatheter aortic valve replacement during the COVID-19 pandemic

Dear editor,Transcatheter aortic valve replacement(TAVR)is a safe and effective first-line therapeutic management for patients with severe aortic stenosis.The evidence of multiple randomized clinical trials proves the safety and efficacy of TAVR in patients.[1-2]However,new-onset conduction disorders,atrial fi brillation,and acute coronary syndrome are still common complications after TAVR procedures.Acute life-threatening complications such as myocardial infarction may result in fatal clinical outcomes.The COVID-19 pandemic makes periodic and timely follow-ups for patients after TAVR more diffi cult.An ambulatory electrocardiogram(AECG)monitoring system by a smart wearable device has recently emerged as a tool to monitor cardiac events before and after TAVR.[3]Smartwatches can monitor and record multiple biometric parameters,like heart rate,step counts,sleep cycles,oxygen saturation,and analyze QRS complexes and P waves after triggering incidences。