Figure 2. Corrected sinus node recovery time (CSNRT) is 629 ms (normal < 525 ms ). CSNRT is greater than 100ms from the upper limit of normal, which is specific to SND; RVA: right ventricle catheter placed in the high right atrium; A-A: sinus rhythm cycle length

From

Syncope Associated with Sinus Nodal Dysfunction in a COVID-19 Patient: A Case Report and Review of the Literature

Andrew V. Doodnauth, Ahmad Jallad, Dahlia Rizk, Emmanuel Valery, Samy I. McFarlane

American Journal of Medical Case Reports. 2021, 9(4), 263-267 doi:10.12691/ajmcr-9-4-15