AI Snips
Chapters
Transcript
Episode notes
Definition And Importance Of QRS Width
- A narrow complex tachycardia is a rapid rhythm >100 bpm with QRS <0.12s (≤3 small squares at 25 mm/s).
- QRS width reflects which conduction pathway the impulse used, guiding diagnosis.
Prioritise Clinical Context And Symptoms
- Always assess clinical context: ask about onset, recurrence, and timing of palpitations.
- Ask specifically about palpitations, dizziness, breathlessness and cardiac chest pain to gauge compromise.
AV Node's Protective Delay
- The AV node is the only electrical connection normally between atria and ventricles and delays conduction.
- That delay (decremental conduction) protects ventricles from very rapid atrial rates.