P-R Interval &#x7C; {Electrocardiograph lead} &#x7C; EKG measurements
p-r interval &#x7c; {electrocardiograph lead} &#x7c; ekg measurements
P-R Interval &#x7C; {Electrocardiograph lead} &#x7C; EKG measurements
p-r interval &#x7c; {electrocardiograph lead} &#x7c; ekg measurements