Chronotropic Incompetence in Non-Hospitalized Patients with Post-COVID-19 Syndrome.
Jimeno-Almazán, Amaya, Pallarés, Jesús G, Buendía-Romero, Ángel et al.·Journal of clinical medicine·2021
Some people who recover from COVID-19 experience persistent fatigue and difficulty exercising for months afterward. This study tested 32 people with long-lasting COVID symptoms and found that about 12% had a specific heart problem called chronotropic incompetence—their heart rate doesn't increase normally during exercise. This heart rhythm problem may explain why some patients struggle with exercise intolerance after COVID-19.