Prevalence of raised cardiac markers in SVT and variables associated with raised troponin I

Cardiac troponins are the major sensitive and specific markers of myocardial injury. Joint European Society of Cardiology/American College of Cardiology committee has given the redefinition of myocardial infarction (MI) stating that troponins are the preferred cardiac markers for detecting myocardial injury. Besides MI, elevated troponins are also seen in tachyarrhythmias, acute cerebrovascular accident, acute pulmonary thromboembolism, chronic kidney disease, septic shock, myocardial injury. Though Troponin I frequently increases during myocardial injury, the etiology may vary from coronary to non- coronary causes. Paroxysmal supraventricular tachycardia (PSVT) is the commonest form of arrhythmia seen in the Emergency Department. In contrast to ventricular tachyarrhythmias these patients are haemodynamically stable and they have good prognosis on treatment. Serum cardiac troponin I (cTnI) testing provides momentous risk stratification in these group of arrhythmias. This study will provide comprehensive data on prevalence, clinical profile, risk factors and prognosis of patients with elevated Troponin I in SVT in non CAD patients.