"Dagger-like Q waves" refer to narrow and deep Q waves that primarily occur in septal hypertrophy in hypertrophic cardiomyopathy. "Dagger" means a short sword, representing Q waves with a sharp, dagger-like shape. From the lateral wall leads, the septal excitation moves in a direction away from them, which is why Q waves often appear centered on the lateral wall leads.
September 1, 2026 146 1
