QRS initial amplitude.lead AVL &#x7C; Heart &#x7C; EKG measurements
qrs initial amplitude.lead avl &#x7c; heart &#x7c; ekg measurements
QRS initial amplitude.lead AVL &#x7C; Heart &#x7C; EKG measurements
qrs initial amplitude.lead avl &#x7c; heart &#x7c; ekg measurements