Q waves

Question 1

Qwaves not seen in which leads

Answer 1

Q Waves
→ NOT seen in right-sided leads-V1-V3

Question 2

Q waves are normal in

Answer 2

avr and Ld III->/=2mm
seen in most leads except V1-V3

Question 3

Pathological when (in at least 2 leads):

Answer 3

• 1. > 3 mm deep
• 2. ≥ 1 mm wide
• 3. > 25% of the depth of QRS (i.e., the amplitude of following R wave)
• 4. When seen in V1–3

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✴️ Indicate current / previous MI