MCL1
Bonadonna's Lead System for Viewing MCL1, Lead II and Lead III

LEAD SELECTOR ON CARDIAC MONITOR | ACTUAL LEAD OBSERVED | MYOCARDIAL WALL REPRESENTED | USEFUL FOR: |
I | MCL1 | Antero-septal | MCL1 can be used to determine R or L Bundle Branch Block Identifying Acute changes in the Anteroseptal wall and Atrial and ventricular hypertrophy may be evident |
II | III | Inferior | Lead III is useful for atrial arrhythmias and for identification of inferior wall pathologies |
III | Modified | II | Inferior Same as above |
These three leads are superior for untangling even the most difficult arrhythmias.
Don't forget to appropriately label your strips with the correct lead ID.