Clinical Research Directory

Inclusion Criteria: * patients with chest pain whom are referred by cardiologist for coronary CT angiography and coronary artery calcium score to detect atherosclerosis . Exclusion Criteria: * Patients who refuse to sign the consent * Subjects suspected of having myocardial infarction, unstable angina pectoris, or coronary artery disease * Subjects who experienced heart attack within 40 days prior to the CT scan * Subjects with a diagnosed complicated heart anomaly * BMI \> 35 kg/m2 * Serum creatinine ≥ 1.5 mg/dl * Pregnant subjects * Subjects with a history of hypersensitivity reaction to contrast agents * Subjects with contraindications to the use of nitroglycerine * Subjects who plan to participate or enroll in other randomized clinical trials for cardiovascular disease.