CLINICAL MEDICINE

Detailed explanation-1: -Placement of chest (precordial) electrodes V1: fourth intercostal space, to the right of sternum. V2: fourth intercostal space, to the left of sternum. V3: placed diagonally between V2 and V4. V4: between rib 5 and 6 in the midclavicular line.

Detailed explanation-2: -The septum is represented on the ECG by leads V1 and V2, whereas the lateral wall is represented by leads V5, V6, lead I and lead aVL.

Detailed explanation-3: -Anteroseptal MI on ECG usually is characterized by the presence of ST-elevations in V1-V3 leads acutely followed by the development of Q waves in V1-V3 precordial leads. The presence of Q-waves in these leads is classically referred to as an age-indeterminate anteroseptal infarct.

Detailed explanation-4: -V2 V3 and V4 look at the front of the heart and are the anterior leads. V1 is often ignored but if changes occur in V! and V2 only, these leads are referred to as Septal leads. V5 and V6 look at the left side of the heart and are the lateral leads.