Anajali is studying for her Health Science test, and she needs to remember the sequence of events that lead to cardiac arrest. Which is the correct sequence?i. The heart beats erratically and often stops completely.ii. Ischemia progresses to an infarction.iii. Blockages occur in the right and left coronary arteries.iv. Insufficient blood supply to the heart happens.

First, blockages develop in the right and left coronary arteries (iii). These reduce blood flow to the heart, causing an insufficient blood supply (iv); this ischemia can then progress to an infarction (ii). The resulting damage can make the heart beat erratically or stop completely (i), so the correct sequence is “iii, iv, ii, i.”

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