heart attack

noun

: an acute episode of coronary heart disease marked by the death or damage of heart muscle due to insufficient blood supply to the heart usually as a result of a coronary artery becoming blocked by a blood clot formed in response to a ruptured or torn fatty arterial deposit

Note: Symptoms of heart attack include discomfort or pain in the chest, shoulder, arm, back, neck, or jaw, shortness of breath, dizziness or lightheadedness, heartburn, nausea, excessive sweating, and extreme fatigue.

called also myocardial infarction

Examples of heart attack in a Sentence

Her chest pains turned out to be caused by a minor heart attack.

He died of a massive heart attack.

Recent Examples on the Web

The new Ozzy — named after her paternal grandfather, the former Black Sabbath frontman who died of a heart attack last July — clocked in a week ago at 7 pounds, 12 ounces, and 19 inches long, according to the photo. —Assistant Editor, Los Angeles Times, 12 Mar. 2026

His death certificate listed the cause of death as a heart attack. —Brendan Morrow, USA Today, 12 Mar. 2026

Mendez, 19 at the time, was charged and held for two years for manslaughter of a police officer because the officer who arrested him had a heart attack shortly after the arrest and died. —Marta Zherukha, Miami Herald, 11 Mar. 2026

Khloé’s then husband, Lamar Odom, spiraled into drug abuse, was found unconscious at a Nevada brothel called Love Ranch, and suffered 12 strokes and six heart attacks while in an extended coma. —Nate Freeman, Vanity Fair, 11 Mar. 2026

Word History

First Known Use

1836, in the meaning defined above

Rhymes for heart attack

• almanac
• camelback
• cardiac
• carryback
• cluniac
• diamondback
• lumberjack
• maniac
• paperback
• piggyback
• quarterback
• saddleback

Kids Definition

heart attack

noun

: a sudden severe occurrence of damage to heart muscle caused by too little blood going to the heart usually as a result of the blocking of a coronary artery (as by a bit of fatty matter)

Medical Definition

heart attack

noun

: an acute episode of coronary heart disease marked by the death or damage of heart muscle due to insufficient blood supply to the heart muscle usually as a result of a coronary artery becoming blocked by a blood clot formed in response to a ruptured or torn fatty arterial deposit

Note: Symptoms of heart attack include discomfort or pain in the chest, shoulder, arm, back, neck, or jaw, shortness of breath, dizziness or light-headedness, heartburn, nausea, excessive sweating, and extreme fatigue.

When a patient is in the throes of a heart attack, the physician's goal is restoring adequate blood flow to the starving heart muscle as swiftly as possible.

—Harvard Medical School Health Letter

It has long been known that aspirin helps prevent blood clots … and many studies have shown that the drug can reduce the incidence of heart attacks and strokes.

—Peter Aldhous, Science

called also acute myocardial infarction, myocardial infarction

compare angina pectoris, coronary insufficiency, heart failure sense 1