Blood carnitine as a biomarker for acute myocardial infarction. L Carnitine Premature Mortality Life Extension Pathobiological Relationship of Excessive Dietary Intake of Choline L Carnitine: A TMAO Precursor Associated Aggravation in Heart Failure in Sarcopenic Patients The Role of Carnitine in Myocardial Dysfunction Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications