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Zorluk: OrtaDiagnostic Workup and Test Sequencing

An executive visits a primary care provider to discuss recurrent chest tightness. The 54-year-old male patient reports that the central chest sensation is predictably triggered by brisk walking and consistently subsides following a few minutes of rest. His medical history includes type 2 diabetes mellitus and dyslipidemia, which are managed with metformin and rosuvastatin. Office vital signs show a pulse of 74/min and a blood pressure of 136/82 mm Hg. Cardiopulmonary auscultation yields no murmurs, gallops, or abnormal breath sounds. The patient is functionally active, has a normal gait, and exercises recreationally. A baseline resting electrocardiogram demonstrates normal sinus rhythm with no ST-segment or T-wave alterations. Which of the following is the most appropriate next step in the diagnostic workup?

  1. Exercise treadmill testing without imagingCevap
  2. B
    Invasive coronary angiography
  3. C
    Resting echocardiography
  4. D
    Pharmacologic myocardial perfusion imaging
  5. E
    Computed tomography measurement of coronary calcium

Cevap

Exercise treadmill testing without imaging is the preferred initial diagnostic test.
The patient presents with classic symptoms of stable angina (exertional chest pain relieved by rest). For initial diagnosis in a patient with a moderate pretest probability of coronary artery disease, the sequence of testing depends on two factors: the physical ability to exercise and the baseline electrocardiogram. Because this patient is ambulatory and has a normal resting electrocardiogram (no left bundle branch block, pacing, or baseline ST depressions), a standard exercise treadmill test without imaging is the most appropriate, cost-effective, and guideline-supported next step. It allows assessment of symptoms, functional capacity, and hemodynamic response to exertion.

Adım Adım Çözüm

1
Determine the patient's pretest probability of coronary artery disease.
The patient has a moderate pretest probability based on his age, gender, and description of typical angina (substernal chest pain provoked by exertion and relieved by rest).
Establishing pretest probability dictates whether any testing is needed and which type is most appropriate.
2
Assess the patient's ability to exercise and the quality of the baseline electrocardiogram.
The patient is functionally active (able to briskly walk) and his baseline electrocardiogram shows no repolarization abnormalities.
These factors are required to choose between exercise versus pharmacologic stress, and between electrocardiographic versus imaging-based monitoring.
3
Select the optimal initial diagnostic study based on established guidelines.
Exercise treadmill testing without imaging is identified as the most appropriate first-line investigation.
It is the safest, most cost-effective initial modality for patients who can exercise and have a normal resting electrocardiogram.

Anahtar Kavram

Patients with suspected stable ischemic heart disease who can exercise and have a normal baseline electrocardiogram should initially undergo exercise treadmill testing without imaging.
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Diagnostic Workup and Test Sequencing

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