[1] : WordNet (r) 2.0

heart attack
     n : a sudden severe instance of abnormal heart function

[2] : Moby Thesaurus II by Grady Ward, 1.0

71 moby thesaurus words for "heart attack":
   angina, angina pectoris, aortic insufficiency, aortic stenosis,
   apoplectic stroke, apoplexy, arrhythmia, arteriosclerosis,
   atherosclerosis, atrial fibrillation, auricular fibrillation,
   beriberi heart, cardiac arrest, cardiac insufficiency,
   cardiac shock, cardiac stenosis, cardiac thrombosis, carditis,
   congenital heart disease, cor biloculare, cor juvenum,
   cor triatriatum, coronary, coronary insufficiency,
   coronary thrombosis, diastolic hypertension, encased heart,
   endocarditis, extrasystole, fatty heart, fibroid heart,
   flask-shaped heart, frosted heart, hairy heart, heart block,
   heart condition, heart disease, heart failure, high blood pressure,
   hypertension, hypertensive heart disease, ischemic heart disease,
   mitral insufficiency, mitral stenosis, myocardial infarction,
   myocardial insufficiency, myocarditis, myovascular insufficiency,
   ox heart, palpitation, paralytic stroke, paroxysmal tachycardia,
   pericarditis, pile, premature beat, pseudoaortic insufficiency,
   pulmonary insufficiency, pulmonary stenosis,
   rheumatic heart disease, round heart, sclerosis, stony heart,
   stroke, tachycardia, thrombosis, tricuspid insufficiency,
   tricuspid stenosis, turtle heart, varicose veins, varix,
   ventricular fibrillation

Attack >> A Words
Attack, definition of term: Attack
attack_pag1.html

Enlarged Heart >> E Words
Enlarged Heart, definition of term: Enlarged Heart
enlarged+heart_pag1.html

By Heart >> B Words
By Heart, definition of term: By Heart
by+heart_pag1.html

Bleeding Heart >> B Words
Bleeding Heart, definition of term: Bleeding Heart
bleeding+heart_pag1.html

Angle Of Attack >> A Words
Angle Of Attack, definition of term: Angle Of Attack
angle+of+attack_pag1.html