II. Risk Factors

III. Epidemiology

  1. Prevalence of CAD in U.S.: 64 million (2001)
  2. Incidence of acute MI in U.S.: 1.2 million yearly
  3. No prior coronary symptoms in >50% with fatal acute MI
  4. Coronary deaths account for 20% of all deaths in U.S.

IV. Pathophysiology: Atherosclerotic Plaque

  1. Form over 10-15 years in response to vascular injury
    1. Significant Plaque present in 75% of age >25 years
  2. Lipid core (atheroma)
    1. Injured endothelium attracts Macrophages
    2. Macrophages resorb LDL Cholesterol fatty streaks
    3. Lipids transform Macrophages into foam cells
  3. Surrounding wall (fibroatheroma)
    1. Surrounds lipid core
    2. Composed of fibroblasts and smooth muscle cells
  4. Acute MI or Acute Coronary Syndrome
    1. Occurs on Plaque rupture; results in vessel Occlusion

V. Pathophysiology: Postinfarction remodeling

  1. Early Phase (<72 hours)
    1. Infarct zone expansion
    2. Myocardial wall thinning and ventricular dilation
    3. Increased elevated myocardial wall stress throughout cardiac cycle
    4. Renin-Angiotensin System activated (increased BNP)
  2. Late Phase (>72 hours)
    1. Left ventricle generalized effects and ventricular dilation over time resulting in distorted ventricular shape
    2. Mural hypertrophy occurs in response to ventricular load (decreases rate of dilation, preserves contractility)
    3. Fibrous tissue replaces necrotic myocytes in the first 4 weeks after Myocardial Infarction
    4. Ventricular effects do not improve with revascularization
  3. References
    1. Sutton (2000) Circulation 101(25):2981-8 [PubMed]

VI. Symptoms

  1. TIMI Risk Score
  2. See Angina Diagnosis
    1. Reviews the likelihood that Chest Pain is due to cardiovascular cause
    2. ACS is asymptomatic in 25% of Myocardial Infarctions
  3. Findings that most increase the likelihood of Acute Coronary Syndrome
    1. See Chest Pain
    2. Pain radiation to the right chest or bilateral chest (or Shoulder)
    3. Exertional pain
    4. Pain with diaphoresis
    5. Pain associated with Vomiting (not only Nausea)
  4. Chest Pain due to Myocardial Infarction is similar to Angina
    1. Deep, poorly localized chest ache
      1. Worse with activity
      2. Better with rest and Nitroglycerin
    2. Radiation
      1. Arm, Shoulder, hand or upper back
      2. Radiation to right arm or bilateral arms is more suggestive of coronary syndrome
      3. May also radiate to neck, jaw or throat (less specific)
  5. Distinguishing features of Chest Pain due to Myocardial Infarction
    1. More intense than Angina
    2. More persistent than Angina (>30 minutes)
    3. Not fully relieved by palliative measures
      1. Rest
      2. Nitroglycerin (3 consecutive doses)
    4. Accompanied by systemic symptoms
      1. Vomiting
      2. Diaphoresis
      3. Apprehension

VII. Signs

  1. Pallor
  2. Diaphoresis
  3. Tachycardia
  4. S4 Gallup Rhythm
  5. Signs of Congestive Heart Failure may also be present
    1. Rales on Lung Examination
    2. S3 Gallup Rhythm
  6. Jugular Venous Distention
    1. Seen in Right Ventricular Infarction

IX. Diagnosis

  1. Serum Cardiac Markers
    1. Serial Troponin
  2. Electrocardiogram
    1. See Electrocardiogram in Myocardial Infarction
    2. Evaluate Electrocardiogram carefully
      1. Ischemic changes (e.g. ST segment depression or T Wave inversion) are commonly missed
  3. Echocardiogram
    1. See Echocardiogram in Myocardial Infarction

XI. Complications

  1. Arrhythmia
    1. Ventricular Fibrillation
    2. Accelerated Idioventricular Rhythm
    3. Bradyarrhythmia
    4. Atrioventricular Block
  2. Congestive Heart Failure
  3. Cardiogenic Shock
  4. Acute Mechanical Complications
    1. Ventricular Septal Rupture
    2. Acute Mitral Regurgitation
  5. Pericarditis
  6. Ventricular aneurysm
  7. Recurrent Angina
  8. Dressler's Syndrome

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Ontology: Coronary Arteriosclerosis (C0010054)

Definition (MSH) Thickening and loss of elasticity of the CORONARY ARTERIES, leading to progressive arterial insufficiency (CORONARY DISEASE).
Concepts Disease or Syndrome (T047)
MSH D003324
ICD9 414.0
ICD10 I25.1 , K76.1, I25.10
SnomedCT 53741008, 266231003, 41702007, 155316000, 194841001, 266290000, 194795001, 155315001
LNC MTHU020784
English Arterioscleroses, Coronary, Arteriosclerosis, Coronary, Coronary Arterioscleroses, Coronary Arteriosclerosis, CORONARY ARTERIOSCLEROSIS, CORONARY SCLEROSIS, ARTERIOSCLEROTIC HEART DISEASE, Atherosclerotic heart disease, Coronary atheroma, coronary arteriosclerosis (diagnosis), coronary arteriosclerosis, ASHD - Atherosclerotic heart disease, Cardiac sclerosis, Coronary (artery) atherosclerosis, Coronary (artery) sclerosis, cardiac ischemia, myocardial ischemia, Disease;atherosclerotic;heart, arteriosclerotic heart disease, cardiac ischaemia, coronary atheroma, coronary sclerosis, ischaemic heart disease, coronary heart disease, myocardial ischaemia, coronary artery atherosclerosis, coronary artery diseases, coronary artery disease, coronary atherosclerosis, Atherosclerotic heart disease NOS, Coronary atherosclerosis (disorder), cardiac; sclerosis, coronary; arteriosclerosis, coronary; sclerosis, disease (or disorder); arteriosclerotic, coronary (artery), disease (or disorder); arteriosclerotic, heart, heart; arteriosclerosis, sclerosis; cardiac, sclerosis; coronary, arteriosclerosis; coronary (artery), arteriosclerosis; coronary, arteriosclerosis; heart, Atheroscleroses, Coronary, Atherosclerosis, Coronary, Coronary Atheroscleroses, Coronary Atherosclerosis, Arteriosclerotic heart disease, Coronary arteriosclerosis, Coronary sclerosis, Coronary arteriosclerosis (disorder), ASHD, Coronary artery arteriosclerosis, atherosclerotic heart disease, Coronary atherosclerosis, Arteriosclerosis coronary artery, Coronary artery atherosclerosis, Coronary artery sclerosis
German KORONARSKLEROSE, Arteriosklerose der Koronararterie, Koronararterie Sklerose, arteriosklerotische Herzkrankheit, Koronarsklerose, Koronararteriosklerose, Atherosklerotische Herzkrankheit, Koronararteriensklerose, Sklerose, Koronar-
Dutch kransslagaderateriosclerose, kransslagaderatherosclerose, kransslagadersclerose, arteriosclerotische hartaandoening, aandoening; arteriosclerotisch, coronair{arterie}, aandoening; arteriosclerotisch, hart, arteriosclerose; aandoening, coronair{arterie}, arteriosclerose; aandoening, hart, arteriosclerose; coronair, cardiaal; sclerose, coronair; arteriosclerose, coronair; sclerose, hart; arteriosclerose, sclerose; cardiaal, sclerose; coronair, Arteriosclerose, coronaire, Atherosclerose, coronaire, Atherosclerotische hartziekte, Coronaire arteriosclerose, Coronaire atherosclerose, Coronaire hartziekte, Coronairziekte
French Artériosclérose de l'artère coronaire, Sclérose de l'artère coronaire, Athérosclérose artérielle coronaire, Athérosclérose coronaire, Sclérose coronaire, Maladie cardiaque artérioscléreuse, SCLEROSE CORONAIRE, Artériosclérose coronaire, Artériosclérose coronarienne, Athérosclérose coronarienne, Artériosclérose des artères coronaires, Artériosclérose des coronaires, Athérosclérose des artères coronaires, Athérosclérose des coronaires
Italian Arteriosclerosi dell'arteria coronaria, Sclerosi coronarica, Stenosi dell'arteria coronaria, Aterosclerosi coronarica, Aterosclerosi dell'arteria coronaria, Cardiopatia arteriosclerotica, Arteriosclerosi coronarica
Portuguese Arteriosclerose das coronárias, Esclerose coronária, Aterosclerose das artérias coronárias, Esclerose das artérias coronárias, Aterosclerose coronária, Cardiopatia arteriosclerótica, ESCLEROSE CORONARIA, Arteriosclerose Coronária, Aterosclerose Coronária
Spanish Arterioesclerosis de la arteria coronaria, Ateroesclerosis de la arteria coronaria, Esclerosis coronaria, Esclerosis de la arteria coronaria, Ateroesclerosis coronaria, CORONARIA, ESCLEROSIS, Arteriosclerosis Coronaria, arteriosclerosis coronaria (trastorno), arteriosclerosis coronaria, arterioesclerosis coronaria, Enfermedad arterioesclerotica cardiaca, ateroesclerosis coronaria (trastorno), esclerosis coronaria, ateroesclerosis coronaria, enfermedad ateroesclerótica cardíaca, enfermedad aterosclerótica cardíaca, Aterosclerosis Coronaria
Japanese 冠血管硬化症, 冠状動脈粥状硬化症, 冠動脈粥状硬化症, 動脈硬化性心疾患, カンジョウドウミャクジュクジョウコウカショウ, カンドウミャクコウカショウ, カンケッカンコウカショウ, カンドウミャクジュクジョウコウカショウ, ドウミャクコウカセイシンシッカン, アテローム硬化症-冠状, 冠状動脈硬化, 冠状アテローム硬化症, 冠状動脈アテローム硬化, 冠状動脈硬化症, 冠動脈アテローム硬化, 冠動脈硬化症, 動脈硬化症-冠状動脈, 冠動脈アテローム性硬化, 冠状動脈アテローム性硬化症, 冠動脈硬化, 冠状動脈アテローム性硬化
Czech koronární arterioskleróza, Arterioskleróza koronárních tepen, Koronární skleróza, Arteriosklerotické onemocnění srdce, Ateroskleróza koronárních arterií, Skleróza koronární arterie, Koronární ateroskleróza
Korean 죽상경화성 심장병
Croatian KORONARNA ARTERIOSKLEROZA
Hungarian Coronaria atherosclerosis, Arteria cor onaria arteriosclerosis, Coronariasclerosis, Arteria coronaria atherosclerosis, Szív arterioscleroticus betegsége, Arteria coronaria sclerosis
Norwegian Koronar arteriosklerose

Ontology: Myocardial Infarction (C0027051)

Definition (MEDLINEPLUS)

Each year over a million people in the U.S. have a heart attack. About half of them die. Many people have permanent heart damage or die because they don't get help immediately. It's important to know the symptoms of a heart attack and call 9-1-1 if someone is having them. Those symptoms include

  • Chest discomfort - pressure, squeezing, or pain
  • Shortness of breath
  • Discomfort in the upper body - arms, shoulder, neck, back
  • Nausea, vomiting, dizziness, lightheadedness, sweating

These symptoms can sometimes be different in women.

What exactly is a heart attack? Most heart attacks happen when a clot in the coronary artery blocks the supply of blood and oxygen to the heart. Often this leads to an irregular heartbeat - called an arrhythmia - that causes a severe decrease in the pumping function of the heart. A blockage that is not treated within a few hours causes the affected heart muscle to die.

NIH: National Heart, Lung, and Blood Institute

Definition (NCI_FDA) Gross necrosis of the myocardium, as a result of interruption of the blood supply to the area, as in coronary thrombosis.
Definition (NCI_CTCAE) A disorder characterized by gross necrosis of the myocardium; this is due to an interruption of blood supply to the area.
Definition (NCI) Gross necrosis of the myocardium, as a result of interruption of the blood supply to the area, as in coronary thrombosis.
Definition (CSP) gross necrosis of the myocardium, as a result of interruption of the blood supply to the area.
Definition (MSH) NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
Concepts Disease or Syndrome (T047)
MSH D009203
ICD10 I22 , I21
SnomedCT 66514008, 266288001, 155304006, 194796000, 233824008, 22298006
LNC LP98884-7, MTHU035551, LA14274-7, LA10558-7
English Myocardial Infarct, Infarctions, Myocardial, Myocardial Infarction, Myocardial Infarctions, Infarcts, Myocardial, Myocardial Infarcts, HEART ATTACK, Infarct, Myocardial, Infarction, Myocardial, MI, Myocardial infarction (MI), Attack heart (NOS), Infarct myocardial, cardiac infarction, Myocardial Infarction [Disease/Finding], attacking heart, heart attacks, attack hearts, infarctions myocardial, infarcts myocardial, myocardial infarctions, Infarction;heart, myocardial infarcts, Infarction;myocardial, AMI, attacks coronary, attacks hearts, coronary attack, disorder infarction myocardial, myocardial necrosis, syndrome myocardial infarction, heart attack, mies, Heart Attack, Attack - heart, Cardiac infarct, myocardial infarction, myocardial infarction (diagnosis), MI, MYOCARDIAL INFARCTION, MYOCARDIAL INFARCTION, MYOCARDIAL INFARCTION, (MI), INFARCTION (MI), MYOCARDIAL, -- Heart Attack, Cardiovascular Stroke, Cardiovascular Strokes, Stroke, Cardiovascular, Strokes, Cardiovascular, Myocardial infarct, Myocardial infarction, Heart attack, MI - Myocardial infarction, Cardiac infarction, Infarction of heart, Myocardial infarction (disorder), cardiac; infarction, infarction; myocardial, Cardiac infarction, NOS, Heart attack, NOS, Infarction of heart, NOS, Myocardial infarction, NOS, Heart Attacks, Infarctions (Myocardial), Myocardial infarction NOS, Attack coronary, heart infarction
German MYOKARDINFARKT, Koronarattacke, Herzanfall, MI, Herzanfall (NNB), HERZANFALL, Herzinfarkt, Myokardinfarkt
Dutch hartaanval, hartinfarct, hartaanval (NAO), MI, cardiaal; infarct, infarct; myocard, myocardinfarct, Hartinfarct, Infarct, myocard-, Myocardinfarct
French Crise coronaire, IM, Crise cardiaque SAI, Crise cardiaque, CRISE CARDIAQUE, INFARCTUS DU MYOCARDE, IDM (Infarctus Du Myocarde), Infarctus du myocarde, Infarctus myocardique
Italian MI, Attacco cardiaco, Attacco coronarico, Attacco cardiaco (NAS), Infarto del miocardio, Infarto miocardico
Portuguese Ataque coronário, Ataque do coração, Ataque cardíaco NE, EM, ATAQUE CARDIACO, ENFARTO DO MIOCARDIO, Enfarte do miocárdio, Infarto do Miocárdio
Spanish IM, Crisis coronaria, Ataque al corazón, Ataque al corazón (NEOM), Infarto miocárdico, ATAQUE CARDIACO, INFARTO DE MIOCARDIO, Infarto al Miocardio, ataque al corazón, infarto cardíaco, infarto de corazón, infarto de miocardio (trastorno), infarto de miocardio, Infarto de miocardio, Infarto del Miocardio
Japanese 心臓発作(NOS), 冠発作, 心臓発作, カンホッサ, シンゾウホッサNOS, シンゾウホッサ, シンキンコウソク, 冠状動脈梗塞, 心筋梗塞, 冠動脈梗塞, 心筋梗塞症
Swedish Hjärtinfarkt
Czech infarkt myokardu, Srdeční záchvat, Srdeční záchvat (NOS), IM, Koronární záchvat, Infarkt myokardu
Finnish Sydäninfarkti
Russian INFARKT MIOKARDA, ИНФАРКТ МИОКАРДА
Croatian SRČANI INFARKT
Polish Świeży zawał serca, Zawał serca świeży, Zawał mięśnia sercowego, Zawał serca
Hungarian Coronaria roham, Szívroham (k.m.n.), Szívroham, Infarctus myocardii, Szívizom infarctus, MI
Norwegian Hjerteinfarkt, Hjerteattakk, Myokardinfarkt

Ontology: Acute Coronary Syndrome (C0948089)

Definition (MSH) An episode of MYOCARDIAL ISCHEMIA that generally lasts longer than a transient anginal episode that ultimately may lead to MYOCARDIAL INFARCTION.
Definition (NCI_CTCAE) A disorder characterized by signs and symptoms related to acute ischemia of the myocardium secondary to coronary artery disease. The clinical presentation covers a spectrum of heart diseases from unstable angina to myocardial infarction.
Definition (NCI) Signs and symptoms related to acute ischemia of the myocardium secondary to coronary artery disease. The clinical presentation covers a spectrum of heart diseases from unstable angina to myocardial infarction.
Concepts Disease or Syndrome (T047)
MSH D054058
SnomedCT 393587009, 394659003
Japanese 急性冠動脈症候群, キュウセイカンドウミャクショウコウグン
English Coronary Syndromes, Acute, Syndromes, Acute Coronary, Acute Coronary Syndromes, Acute Coronary Syndrome, Syndrome, Acute Coronary, Coronary Syndrome, Acute, Acute Coronary Syndrome [Disease/Finding], acute coronary syndromes, syndrome acute coronary, acute coronary syndrome (diagnosis), acute coronary syndrome, Acute coronary syndrome, Acute coronary syndrome (disorder), ACS - Acute coronary syndrome
Portuguese Síndrome Coronariana Aguda, Síndrome coronário agudo
Spanish Síndrome Coronario Agudo, síndrome coronario agudo (trastorno), síndrome coronario agudo, Síndrome coronario agudo
Finnish Akuutti sepelvaltimo-oireyhtymä
German Akutes Koronarsyndrom, akutes Koronarsyndrom
Italian Sindrome coronarica acuta
Russian KORONARNYI SINDROM OSTRYI, КОРОНАРНЫЙ СИНДРОМ ОСТРЫЙ
Swedish Akut koronarsyndrom
Czech Akutní koronární syndrom, akutní koronární syndrom
French Syndrome coronaire aigu, SCA (Syndrome Coronarien Aigu), Syndrome coronarien aigu
Polish Zespół wieńcowy ostry
Hungarian Acut coronaria syndroma
Norwegian Akutt koronarsyndrom, Koronarsyndrom, akutt, AKS
Dutch acuut coronairsyndroom