QRS duration &#x7C; {Electrocardiograph lead} &#x7C; EKG measurements
qrs duration &#x7c; {electrocardiograph lead} &#x7c; ekg measurements
QRS duration &#x7C; {Electrocardiograph lead} &#x7C; EKG measurements
qrs duration &#x7c; {electrocardiograph lead} &#x7c; ekg measurements