AF Patient Assessment & Clinical Evaluation 3 — Questions and Answers
Question 1: Which echocardiographic finding is MOST important to identify before performing electrical cardioversion in a patient with AF of unknown duration?
- Left ventricular ejection fraction
- Left atrial appendage thrombus (Correct answer)
- Mitral valve regurgitation severity
- Right ventricular wall thickness
Correct answer: Left atrial appendage thrombus
Left atrial appendage thrombus must be excluded before cardioversion to prevent systemic embolization.
Question 2: A patient with AF is found to have a blood pressure of 160/95 mmHg on repeated measurements. How does this finding affect clinical management?
- It is unrelated to AF management
- It reduces the CHAâ‚‚DSâ‚‚-VASc score
- It increases stroke risk and warrants blood pressure control (Correct answer)
- It is only relevant if systolic BP exceeds 180 mmHg
Correct answer: It increases stroke risk and warrants blood pressure control
Hypertension is a risk factor in CHAâ‚‚DSâ‚‚-VASc scoring and increases stroke risk in AF, necessitating blood pressure management.
Question 3: Which laboratory test is essential to obtain during initial evaluation of a newly diagnosed AF patient to rule out a reversible cause?
- Serum ferritin
- Thyroid-stimulating hormone (TSH) (Correct answer)
- Fasting glucose
- C-reactive protein
Correct answer: Thyroid-stimulating hormone (TSH)
Hyperthyroidism is a common reversible cause of AF and can be identified by checking TSH.
Question 4: A patient reports that their palpitations always start after consuming alcohol. This finding is BEST described as:
- Lone AF unrelated to lifestyle
- Holiday heart syndrome (Correct answer)
- Vagally mediated AF
- Adrenergically triggered AF
Correct answer: Holiday heart syndrome
Holiday heart syndrome refers to AF precipitated by acute alcohol consumption, often in otherwise healthy individuals.
Question 5: In a patient with AF and heart failure with reduced ejection fraction (HFrEF), which symptom overlap requires careful differentiation during assessment?
- Chest pain
- Dyspnea and exercise intolerance (Correct answer)
- Syncope
- Peripheral edema only
Correct answer: Dyspnea and exercise intolerance
Dyspnea and exercise intolerance are common to both AF with rapid ventricular response and HFrEF, requiring distinction to guide treatment.
Question 6: Which element of the physical exam specifically assesses the adequacy of cerebral perfusion in a patient with rapid AF?
- Auscultation of the mitral valve
- Mental status evaluation (Correct answer)
- Palpation of the liver
- Assessment of pedal pulses
Correct answer: Mental status evaluation
Mental status changes such as confusion or syncope suggest inadequate cerebral perfusion from hemodynamically significant AF.
Question 7: A patient with AF is asymptomatic and has a resting heart rate of 95 bpm. According to current guidelines, which statement about rate control targets is MOST accurate?
- Rate must be below 60 bpm at rest
- A lenient rate control target of <110 bpm is acceptable in stable patients (Correct answer)
- Rate control is unnecessary if the patient is asymptomatic
- Heart rate should be measured only during exercise
Correct answer: A lenient rate control target of <110 bpm is acceptable in stable patients
Current guidelines support a lenient rate control target of <110 bpm at rest in asymptomatic patients with stable AF.
AF Patient Assessment & Clinical Evaluation 3
Which echocardiographic finding is MOST important to identify before performing electrical cardioversion in a patient with AF of unknown duration?