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Soru

Zorluk: ZorDiagnostic Workup and Test Sequencing

Match each patient presenting with suspected stable ischemic heart disease to the most appropriate next step in their diagnostic workup.

  • A 54-year-old woman with occasional substernal chest tightness when walking uphill. She plays tennis twice a week. Her resting ECG shows normal sinus rhythm with no ST-segment or T-wave abnormalities.Exercise electrocardiography (without imaging)
  • A 70-year-old man with exertional chest pain. He has a permanent ventricular pacemaker and his ECG demonstrates a ventricular paced rhythm. He is highly active and swims daily without difficulty.Pharmacologic vasodilator stress myocardial perfusion imaging
  • A 62-year-old woman with exertional chest heaviness. She jogs regularly. Her baseline ECG demonstrates left ventricular hypertrophy with 1.5-mm resting ST-segment depressions in the lateral leads.Exercise stress echocardiography
  • A 65-year-old man with predictable substernal chest pain after walking short distances. He remains highly symptomatic despite adherence to maximal doses of a beta-blocker, a calcium channel blocker, and a long-acting nitrate.Invasive coronary angiography

Cevap

Match the 54-year-old with normal ECG to Exercise electrocardiography. Match the 70-year-old with a paced rhythm to Pharmacologic vasodilator stress MPI. Match the 62-year-old with LVH/ST depressions to Exercise stress echocardiography. Match the 65-year-old with refractory angina to Invasive coronary angiography.
The selection of diagnostic testing for stable ischemic heart disease depends on the patient's symptom control, ability to exercise, and baseline ECG interpretability. Exercise electrocardiography is the standard for those who can exercise and have a normal ECG. Patients with uninterpretable baseline ECGs (e.g., ST depressions >0.5 mm, left ventricular hypertrophy) require the addition of imaging, such as stress echocardiography. Patients with left bundle branch block or ventricular paced rhythms are a special exception and must receive pharmacologic vasodilator stress imaging to avoid artifactual septal defects. Finally, patients with angina refractory to maximal guideline-directed medical therapy should bypass noninvasive testing and proceed directly to invasive coronary angiography.

Adım Adım Çözüm

1
Assess the patient's symptom control on their current medical regimen.
The 65-year-old man is refractory to maximal medical therapy.
Patients with severe symptoms despite optimal guideline-directed medical therapy require direct invasive coronary angiography; noninvasive testing would delay definitive management.
2
Identify patients with specific baseline conduction abnormalities that dictate the testing modality.
The 70-year-old man has a ventricular paced rhythm.
Ventricular pacing and LBBB cause artifactual septal perfusion defects with exercise. These patients must be evaluated with pharmacologic vasodilator stress myocardial perfusion imaging, regardless of their exercise capacity.
3
Determine the interpretability of the baseline ECG in the remaining patients.
The 62-year-old woman has baseline ST-segment depressions >0.5 mm, rendering standard ECG interpretation impossible during stress.
When the baseline ECG is uninterpretable but the patient can physically exercise, an imaging modality (such as exercise stress echocardiography) must be added to the exercise test.
4
Assign the standard initial test to the remaining patient with an interpretable ECG who can exercise.
The 54-year-old woman has a normal baseline ECG and can exercise.
Exercise electrocardiography without imaging is the standard, most appropriate initial test for patients who can achieve an adequate workload and have a normal resting ECG.

Anahtar Kavram

Diagnostic algorithm and test sequencing for suspected stable ischemic heart disease (SIHD)
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Konular

Diagnostic Workup and Test Sequencing

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