বহুনির্বাচনি (MCQ)
১. In most people the sinuatrial (SA) node is supplied by a branch of the:
ক) Left anterior descending artery
খ) Circumflex artery
গ) Right coronary artery
ঘ) Posterior interventricular artery only
ঙ) Internal thoracic artery
উত্তর দেখুন
সঠিক উত্তর: গ) Right coronary artery
ব্যাখ্যা: In about 60% of people the SA nodal artery arises from the right coronary artery; in the rest from the circumflex branch of the left coronary artery.
📖 রেফারেন্স: Snell, Clinical Anatomy by Regions · Thorax: blood supply of the heart