Would an abnormal ekg (left branch bundle block) cause complications recovering from covid-19? my ekg showed the left branch bundle block when i was in my early 20s and im in my early 50s now. i was hospitalized for a week with covid-19?

You had LBBB long: this is a new virus and full detail are still unknown but usually as you had LBBB for long by itself it should not be any more by itself unless you have some other associated problems or complications. best will be get examined by your cardiologist hope you are feeling much better .

LBBB & COVID 19: Some cardiac conditions can increase risk for poor out-come such as heart failure, coronary artery disease, dilated cardiomyopathies, arrhythmogenic right ventricular cardiomyopathy, congenital cyanotic heart dz, some valvular defects & pulmonary hypertension. Please see: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7293518/