A significant percentage of patients after COVID-19 infection will have cardiac symptoms of tachycardia, palpitations, and chest pain.
The American College of Cardiology (ACC) has published an expert consensus document to provide an overall framework for the diagnosis and management of patients afflicted with persistent symptoms followed COVID19 infection: https://www.jacc.org/doi/10.1016/j.jacc.2022.02.003
The ACC terms persistent symptoms more than 4 weeks after COVID19 infection as post-acute sequelae of SARS-CoV-2 (PASC). PASC is a constellation of symptoms which can be non-specific. In my practice, I have seen dozens of patients with symptoms such as fatigue, exercise intolerance, orthostasis, shortness of breath, and palpitations after COVID19 infection. I have also seen a few patients with these symptoms after COVID19 vaccination.
A typical cardiology workup would include: 12 lead ECG, echocardiogram, and possibly ambulatory cardiac event monitoring (i.e. Holter). Referral to pulmonology may also be needed for pulmonary function testing (PFT).
I have treated a few patients with midodrine +/- fludrocortinsone to reduce orthostatic intolerance or POTS-like symptoms.
Unfortunately there is no clear and effective treatment. Hopefully the tincture of time will resolve the symptoms.