BBB, Hypertrophy, Brugada, MI

Bundle branch blocks

wide QRS > 0.12 sec and focus on V1/V6 leads

Right BBB

 * V1 rsR’ (basically R is upwards)

• V6 would have a slurred S wave

Left BBB

V1 QS/rS complex (basically R is downwards)

V6 tall R wave, no Q, RSR’

Left axis deviation

Brugada syndrome

narrow QRS

V1-V3 RSR’ with ST elevations with negative T waves

Atrial Hypertrophy

P wave

Left Atrial Hypertrophy(p-mitral)

Lead I / II “m” shaped p wave > 0.12 sec

confirm with V1 Biphasic P(second half bigger for left hypetrophy)

Right Atrial Hypertrophy (p-pulmonale)

II / III peaked p waves > 2.5mm height

confirm with V1 Biphasic P(first half bigger for Right hypertrophy)

Ventricular Hypertrophy

V1/2 and V5/6

Left Ventricular Hypertrophy

Deepest S wave in V1/2 + Tallest R wave in V5/6 > 35

Right Ventricular Hypertrophy

V1/2 tall R > 7mm

V5/6 deep S > 7mm

Lateral MI

I, avL, V5/6. MC left circumflex artery

Inferior MI

II, III, avF……MC right coronary artery

Anterior MI

V3/4: left anterior descending artery

Septal MI

V1/2: left anterior descending artery

Posterior MI

Anterior wall MI(V3/4) with ST depression….right coronary artery or left circumflex artery