Cardiac Care and ECG Flashcards
6 cards from real PCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Cardiac Care and ECG flashcards as text
On a 12-lead ECG, ST-segment elevation in leads II, III, and aVF suggests an infarction in which territory?
Answer: Inferior wall
Leads II, III, and aVF are the inferior leads; ST elevation in these leads indicates an inferior STEMI, typically from RCA occlusion.
Ventricular fibrillation (VF) on an ECG appears as:
Answer: Completely chaotic, irregular waveforms with no identifiable QRS
VF produces chaotic, disorganized electrical activity with no identifiable QRS complexes, P waves, or T waves.
Which rhythm is characterized by a regular narrow-complex tachycardia at 150–250 bpm with no visible P waves?
Answer: Supraventricular tachycardia (SVT)
SVT presents as a regular narrow-complex tachycardia at 150–250 bpm; P waves are often buried in the preceding T wave.
The first-line treatment for stable narrow-complex SVT is:
Answer: Valsalva maneuver or carotid sinus massage
Vagal maneuvers (Valsalva, carotid sinus massage) are the first-line treatment for stable SVT to slow conduction through the AV node.
A patient in third-degree (complete) heart block will show:
Answer: Complete dissociation of P waves and QRS complexes
Third-degree AV block shows complete dissociation — P waves and QRS complexes march independently at different rates.
Which of the following is the correct joule setting for synchronized cardioversion of an unstable narrow-complex tachycardia?
Answer: 50–100 J biphasic
Synchronized cardioversion for narrow-complex tachycardia begins at 50–100 J biphasic and is escalated as needed.