A small but significant percentage of college athletes with COVID-19 develop myocarditis, a potentially dangerous inflammation of the heart muscle, that can only be seen on cardiac MRI, according to a study presented at the annual meeting of the Radiological Society of North America (RSNA) and reported in a news release from RSNA.
Myocarditis, which typically occurs as a result of a bacterial or viral infection, can affect the heart’s rhythm and ability to pump and often leaves behind lasting damage in the form of scarring to the heart muscle. It has been linked to as many as 20% of sudden deaths in young athletes. The COVID-19 pandemic raised concerns over an increased incidence of the condition in student-athletes.
For the new study, clinicians at schools in the highly competitive Big Ten athletic conference collaborated to collect data on the frequency of myocarditis in student-athletes recovering from COVID-19 infection. Conference officials had required all athletes who had COVID-19 to get a series of cardiac tests before returning to play, providing a unique opportunity for researchers to collect data on the athletes’ cardiac status.
Researchers reviewed the results of 1,597 cardiac MRI exams collected at the 13 participating schools. There was no selection bias for cardiac MRI, as all COVID-positive athletes underwent a complete cardiac battery of tests including cardiac MRI, echocardiogram, ECG and blood tests, as well as a complete medical history.
Thirty-seven of the athletes, or 2.3%, were diagnosed with COVID-19 myocarditis, a percentage on par with the incidence of myocarditis in the general population. However, an alarmingly high proportion of the myocarditis cases were found in athletes with no clinical symptoms. Twenty of the patients with COVID-19 myocarditis (54%) had neither cardiac symptoms nor cardiac testing abnormalities. Only cardiac MRI identified the problem.
“We still don’t know the long-term effects,” Jean Jeudy, MD, Professor and Radiologist at the University of Maryland School of Medicine in Baltimore, who serves as the cardiac MRI core leader for the Big Ten Cardiac Registry, which collected the data for the study. “Some athletes had issues that resolved within a month, but we also have athletes with continued abnormalities on their MRI as a result of their initial injury and scarring. There are a lot of chronic issues with COVID-19 that we need to know more about, and hopefully this registry can be one of the major parts of getting that information.”
The registry will allow researchers to look beyond the presence of abnormalities and study things like changes in exercise function over time.
Obstacles to widespread use of cardiac MRI in college athletes are significant and include cost and lack of access to advanced MRI capability at many centers. But as the new study shows, cardiac MRI adds considerable value to cardiac testing.
