A 65 year old man develops crushing substernal pain radiating to the jaw and is found to have ST elevations in leads II, III, and aVF. Several hours later he becomes bradycardic with a new junctional rhythm. Ischemia of which of the following arteries most likely accounts for the conduction abnormality?
- A)First diagonal branch
- B)Posterior descending artery from the left circumflex
- C)Right coronary arteryGABARITO
- D)Left anterior descending artery
- E)Left circumflex artery
Explicação
Right coronary artery is correct. An inferior wall myocardial infarction usually involves the right coronary artery, which in right dominant circulation supplies the AV node in most individuals. AV nodal ischemia can therefore cause bradyarrhythmias or heart b... Ver explicação completa e trilha adaptativa →