> In this study of a cohort of German patients recently recovered from COVID-19 infection, CMR revealed cardiac involvement in 78 patients (78%) and ongoing myocardial inflammation in 60 patients (60%), independent of preexisting conditions, severity and overall course of the acute illness, and time from the original diagnosis. These findings indicate the need for ongoing investigation of the long-term cardiovascular consequences of COVID-19.
Note that this study includes a group of COVID survivors who have recently recovered, and 2 control groups: healthy, age-matched participants, and a group of risk-factor matched control patients. It is published in JAMA Cardiology.
Obviously, this study doesn't say anything about truly long-term consequences of COVID, but that, IMO, is more because we haven't had time to reach "long-term" status yet. I would give it at least another 6 months to a year before making up my mind about the incidence of long-term consequences.