Fetching details from the dictionary...

fit; attack; spasm; ictus; paroxysm; seizure; stroke
彼は心臓発作で病院に緊急搬送された。
He was rushed to the hospital with a heart attack.
喘息の発作が起きて息苦しくなった。
An asthma attack occurred and I had difficulty breathing.
彼はてんかんの発作を起こしやすい体質だ。
He has a constitution prone to epileptic seizures.