A patient is admitted with a cardiac arrhythmia. Which of the following diagnostic tests will help in the diagnosis of this patient's cardiac disorder?
1. cardiac catheterization
2. electrophysiology study
3. echocardiogram
4. exercise electrocardiogram
2
Rationale: The electrophysiology study is an invasive procedure that evaluates the cardiac conduction system and helps classify cardiac arrhythmias. The findings from this study help to determine if the patient would benefit from further interventions such as a pacemaker, implantable cardiodefibrillator, and radiofrequency ablation or medication therapy. Cardiac catheterization is performed to determine the presence and extent of coronary artery disease, evaluate left ventricular function, and to evaluate valvular or myocardial disorders. Echocardiograms are used to visualize blood, cardiac valves, the myocardium, and the pericardium. Exercise electrocardiograms evaluate heart muscle and its blood supply during physical stress.
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