A 35-year-old male patient with palpitations and mild lightheadedness was admitted to our clinic. Short-lasting paroxysmal ventricular tachycardia was diagnosed following 12-lead electrocardiography (ECG). A mass that included two-thirds of the interventricular septum and the left ventricular cavity was seen by two-dimensional echocardiography and magnetic resonance imaging (MRI). Specific hemagglutination tests for hydatid cyst were positive. The mass was excised, and the patient had a septoplasty operation to repair the remaining septal defect. He is currently being followed and reports no complaints. No evidence of arrhythmia was noted in 24-hour ambulatory ECG monitoring.

Congenital anomalies of the coronary artery causing coronary occlusive disease may be of many different types. A 67-year-old woman with no coronary risk factors was referred for coronary angiography with few months' history of angina. The patient underwent coronary angiography due to ischemic cardiac symptoms with nondiagnostic exercising test. In coronary angiography, the left main coronary artery was arising from normal anatomical position; however, left anterior descending artery and circumflex artery were hypoplastic. The treatment of patient was discussed in cardiology-cardiovascular surgery council and coronary surgery was found inappropriate due to the hypoplasia of the left coronary system entirely.

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