P-R Interval &#x7C; Lead V6 &#x7C; EKG measurements
p-r interval &#x7c; lead v6 &#x7c; ekg measurements
P-R Interval &#x7C; Lead V6 &#x7C; EKG measurements
p-r interval &#x7c; lead v6 &#x7c; ekg measurements