It's really tempting for any author to write an article as such it is the final words and dismissed some of the findings and worst perhaps discourage future useful findings by potential researchers. I think this article falls into this demotivating category. I beg to differ, since as far as Covid-19 and heart are concerned, the jury is still out and no record has been straighten.<p>It is interesting to note that most of the papers cited only consider echocardiography, troponin and cardiac MRI as biomakers but not the pervasive ECG. Most of the cardiologists still stucked with the perception of rudimentary and limited accuracy provided by the venerable Pan-Tomskin (PT) based algorithm that was introduced in 1980s i.e. 40 years back. Real world accuracy of the PT algorithm for ECG analysis is probably less than 75%, that means it will only reliably detect very serious heart disease [1]. Modern ECG analysis algorithm can already detect with more than 99% accuracy, specificity and sensitivity [2].<p>Just a small request for the authors (any small chance they will read this comment) or any cardiologists for that matter. Please provide open ECG dataset by donating them to open physiological databases for example MIT-BIH [3]. Provide at least 1000 samples (minimum 1 hour duration) of Covid-19 patients' ECG data without previous history of heart diseases. These essential data will enable other researchers to perform modern ECG analysis. After that we will probably know whether the "Covid heart" is true or not. IMHO, it will be much more constructive than writing the posted popular science article.<p>[1]<a href="https://www.researchgate.net/publication/319066214_The_Accuracy_on_the_Common_Pan-Tompkins_Based_QRS_Detection_Methods_Through_Low-Quality_Electrocardiogram_Database" rel="nofollow">https://www.researchgate.net/publication/319066214_The_Accur...</a><p>[2]<a href="https://en.m.wikipedia.org/wiki/Receiver_operating_characteristic" rel="nofollow">https://en.m.wikipedia.org/wiki/Receiver_operating_character...</a><p>[3]<a href="https://www.physionet.org/content/mitdb/1.0.0/" rel="nofollow">https://www.physionet.org/content/mitdb/1.0.0/</a>