Chest pain

Chest pain is pain or discomfort in the chest, typically the front of the chest.[1] It may be described as sharp, dull, pressure, heaviness or squeezing.[3] Associated symptoms may include pain in the shoulder, arm, upper abdomen, or jaw, along with nausea, sweating, or shortness of breath.[1][3] It can be divided into heart-related and non-heart-related pain.[1][2] Pain due to insufficient blood flow to the heart is also called angina pectoris.[5] Those with diabetes or the elderly may have less clear symptoms.[3]

Chest pain
Other namesPectoralgia, stethalgia, thoracalgia, thoracodynia
Potential location of pain from a heart attack
SpecialtyEmergency medicine, internal medicine
SymptomsDiscomfort in the front of the chest[1]
TypesCardiac, noncardiac[2]
CausesSerious: Acute coronary syndrome (including heart attacks), pulmonary embolism, pneumothorax, pericarditis, aortic dissection, esophageal rupture[3]
Common: Gastroesophageal reflux disease, psychological problems such as anxiety disorders, depression, stress etc, muscle or skeletal pain, pneumonia, shingles[3]
Diagnostic methodMedical history, physical exam, medical tests[3]
TreatmentBased on the underlying cause[1]
MedicationAspirin, nitroglycerin[1][4]
PrognosisDepends on the underlying cause[3]
Frequency~5% of ER visits[3]

Serious and relatively common causes include acute coronary syndrome such as a heart attack (31%), pulmonary embolism (2%), pneumothorax, pericarditis (4%), aortic dissection (1%) and esophageal rupture.[3] Other common causes include gastroesophageal reflux disease (30%), muscle or skeletal pain (28%), pneumonia (2%), shingles (0.5%), pleuritis, traumatic and anxiety disorders.[3][6] Determining the cause of chest pain is based on a person's medical history, a physical exam and other medical tests.[3] About 3% of heart attacks, however, are initially missed.[1]

Management of chest pain is based on the underlying cause.[1] Initial treatment often includes the medications aspirin and nitroglycerin.[1][4] The response to treatment does not usually indicate whether the pain is heart-related.[1] When the cause is unclear, the person may be referred for further evaluation.[3]

Chest pain represents about 5% of presenting problems to the emergency room.[3] In the United States, about 8 million people go to the emergency department with chest pain a year.[1] Of these, about 60% are admitted to either the hospital or an observation unit.[1] The cost of emergency visits for chest pain in the United States is more than US$8 billion per year.[6] Chest pain accounts for about 0.5% of visits by children to the emergency department.[7]

Signs and symptoms

Chest pain may present in different ways depending upon the underlying diagnosis. Chest pain may also vary from person to person based upon age, sex, weight, and other differences.[1] Chest pain may present as a stabbing, burning, aching, sharp, or pressure-like sensation in the chest.[8][1] Chest pain may also radiate, or move, to several other areas of the body. This may include the neck, left or right arms, cervical spine, back, and upper abdomen.[9] Other associated symptoms with chest pain can include nausea, vomiting, dizziness, shortness of breath, anxiety, and sweating.[8][1] The type, severity, duration, and associated symptoms of chest pain can help guide diagnosis and further treatment.

Differential diagnosis

Causes of chest pain range from non-serious to serious to life-threatening.[10]

In adults the most common causes of chest pain include: gastrointestinal (42%), coronary artery disease (31%), musculoskeletal (28%), pericarditis (4%) and pulmonary embolism (2%).[11] Other less common causes include: pneumonia, lung cancer, and aortic aneurysms.[11] Psychogenic causes of chest pain can include panic attacks; however, this is a diagnosis of exclusion.[12]

In children, the most common causes for chest pain are musculoskeletal (76-89%), exercise-induced asthma (4-12%), gastrointestinal illness (8%), and psychogenic causes (4%).[13] Chest pain in children can also have congenital causes.

Cardiovascular

A blockage of coronary arteries can lead to a heart attack
  • Acute coronary syndrome
    • Stable or unstable angina
    • Myocardial infarction ("heart attack"): People usually complained of a pressure or squeezing sensation over the chest.[1] Other associated symptoms are: excessive sweating, nausea, vomiting, and weakness.[1] Chest pain is more commonly associated with anterior infarction because of left ventricular impairment; inferior infarction is more commonly associated with nausea, vomiting, and excessive sweating due to irritation of vagus nerve; lateral infarction is associated with left arm pain.
  • Prinzmetal's angina: Chest pain is caused by coronary vasospasm. More common in women younger than 50 years. Person usually complain of chest pain at rest. It may occur early in the morning which awaken person from sleep.
  • Cocaine use: This condition is suspected when a person with few or no risk of arteriosclerosis presented with non-traumatic chest pain. Ingestion of cocaine can cause vasoconstriction of coronary arteries, thus producing chest pain similar to heart attack. Symptoms can appear within one hour of cocaine use.
  • Aortic stenosis: This condition happens when the person has underlying congenital bicuspid valve, aortic sclerosis, or history of rheumatic fever. Chest pain usually happens during physical activity. Syncope is a late symptom. Signs and symptoms of heart failure may also present. On auscultation, loud ejection systolic murmur can be best heard at the right second intercostal space and radiates to the carotid artery in the neck. Splitting of second heart sound is heard in severe stenosis.
  • Hypertrophic cardiomyopathy: It is the hypertrophy of interventricular septum that causes outflow obstruction of left ventricle. Dyspnea and chest pain commonly occurs during daily activities. Sometimes, syncope (fainting) may happen. On physical examination, significant findings include: loud systolic murmur and palpable triple apical impulse due to palpable presystolic fourth heart sound.
  • Aortic dissection is characterized by severe chest pain that radiates the back. It is usually associated with Marfan's syndrome and hypertension. On examination, murmur of aortic insufficiency can be heard with unequal radial pulses.[14]
  • Pericarditis: This condition can be the result of viral infection such as coxsackie virus and echovirus, tuberculosis, autoimmune disease, uremia, and after myocardial infarction (Dressler syndrome). The chest pain is often pleuritic in nature (associated with respiration) which is aggravated when lying down and relieved on sitting forward, sometimes, accompanied by fever. On auscultation, pericardial friction rub can be heard.
  • Cardiac tamponade
  • Arrhythmia: Atrial fibrillation and a number of other arrhythmias can cause chest pain.
  • Myocarditis
  • Mitral valve prolapse syndrome: Those affected are usually slim females presented with chest pain which is sharp in quality, localized at the apex, and relieved when lying down. Other symptoms include: shortness of breath, fatigue, and palpitations. On auscultation, midsystolic click followed by late systolic murmur can be heard, louder when person is in standing position.
  • Aortic aneurysm

Respiratory

  • Asthma is a common long-term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm. Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. Chest pain usually happens during a strenuous activity or heavy exercise.
  • Bronchitis
  • Pulmonary embolism: Common signs and symptoms are shortness of breath, pleuritic chest pain, blood in sputum during cough, and lower limb swelling. Risk factors includes: recent surgery, malignancy, and bedridden state. Source of embolus usually comes from venous thromboembolism.
  • Pneumonia[11]
  • Hemothorax
  • Pneumothorax: Those who are at a higher risk of developing pneumothorax are tall, slim male smokers who have had underlying lung diseases such as emphysema. Those affected can have a sharp chest pain which radiates to the shoulder of the same side. Physical examination revealed absent breath sounds and hyperresonance on the affected side of the chest.
  • Pleurisy[11]
  • Tuberculosis
  • Tracheitis
  • Lung cancer

Gastrointestinal

Gastroesophageal reflux disease is a common cause of chest pain in adults

Chest wall

Psychological

Others

Diagnostic approach

History taking

Knowing a person's risk factors can be extremely useful in ruling in or ruling out serious causes of chest pain. For example, heart attack and thoracic aortic dissection are very rare in healthy individuals under 30 years of age, but significantly more common in individuals with significant risk factors, such as older age, smoking, hypertension, diabetes, history of coronary artery disease or stroke, positive family history (premature atherosclerosis, cholesterol disorders, heart attack at early age), and other risk factors. Chest pain that radiates to one or both shoulders or arms, chest pain that occurs with physical activity, chest pain associated with nausea or vomiting, chest pain accompanied by diaphoresis or sweating, or chest pain described as "pressure," has a higher likelihood of being related to acute coronary syndrome, or inadequate supply of blood to the heart muscle, but even without these symptoms chest pain may be a sign of acute coronary syndrome.[17] Other clues in the history can help lower the suspicion for myocardial infarction. These include chest pain described as "sharp" or "stabbing", chest pain that is positional or pleuritic in nature, and chest pain that can be reproduced with palpation.[18][19] However, both atypical and typical symptoms of acute coronary syndrome can occur, and in general a history cannot be enough to rule out the diagnosis of acute coronary syndrome.[19] In some cases, chest pain may not even be a symptom of an acute cardiac event. An estimated 33% of persons with myocardial infarction in the United States do not present with chest pain, and carry a significantly higher mortality as a result of delayed treatment.[20]

Physical examination

Careful medical history and physical examination is essential in separating dangerous from trivial causes of disease, and the management of chest pain may be done on specialized units (termed medical assessment units) to concentrate the investigations. Occasionally, invisible medical signs will direct the diagnosis towards particular causes, such as Levine's sign in cardiac ischemia.[21] However, in the case of acute coronary syndrome, a third heart sound, diaphoresis, and hypotension are the most strongly associated physical exam findings.[22] However these signs are limited in their prognostic and diagnostic value.[8] Other physical exam findings suggestive of cardiac chest pain may include hypertension, tachycardia, bradycardia, and new heart murmurs.[8] Chest pain that is reproducible during the physical exam with contact of the chest wall is more indicative of non-cardiac chest pain, but still cannot completely rule out acute coronary syndrome.[23] For this reason, in general, additional tests are required to establish the diagnosis.

In the emergency department the typical approach to chest pain involves ruling out the most dangerous causes: heart attack, pulmonary embolism, thoracic aortic dissection, esophageal rupture, tension pneumothorax, and cardiac tamponade. By elimination or confirmation of the most serious causes, a diagnosis of the origin of the pain may be made. Often, no definite cause will be found and reassurance is then provided.[10]

Risk scores

The Global Registry of Acute Coronary Events score and the Thrombosis in Myocardial Infarction performed at time of admission may help stratify persons into low, intermediate and high risk groups for acute coronary syndrome.[1] However these scores do not provide management guidelines for risk-stratified persons.

The HEART score, stratifies persons into low-risk and high-risk groups, and recommends either discharge or admission based upon the score.[1]

HEART score[24][25]
Criteria Point Value
History
Highly suspicious +2
Moderately suspicious +1
Slightly suspicious 0
ECG
Significant ST-depression +2
Nonspecific repolarization disturbance +1
Normal 0
Age
≥ 65 +2
45-65 +1
≤ 45 0
Risk factors*
≥ 3 risk factors or history of atherosclerotic disease +2
1-2 risk factors +1
No risk factors known 0
Troponin
≥ 3× normal limit +2
1-3× normal limit +1
≤ normal limit 0
*include hypercholesterolemia, hypertension, diabetes mellitus, smoking, obesity

Cumulative score:

  • 0-3: 2.5% risk of adverse cardiac event. Patient's can be discharged with follow-up.
  • 4-6: 20.3% risk of adverse cardiac event. Patients should be admitted to the hospital for trending of troponin and provocative testing.
  • ≥7: 72.7% risk of adverse cardiac event, suggesting early invasive measures with these patients and close coordination with inpatient cardiology.

If acute coronary syndrome ("heart attack") is suspected, many people are admitted briefly for observation, sequential ECGs, and measurement of cardiac enzymes in the blood over time. On occasion, further tests on follow up may determine the cause.

Medical tests

On the basis of the above, a number of tests may be ordered:[26]

Management

Management of chest pain varies with the underlying cause of the pain and the stage of care.

Prehospital care

Chest pain is a common symptom encountered by emergency medical services. Aspirin increases survival in people with acute coronary syndrome and it is reasonable for EMS dispatchers to recommend it in people with no recent serious bleeding.[28] Supplemental oxygen was used in the past for most people with chest pain but is not needed unless the oxygen saturations are less than 94% or there are signs of respiratory distress.[29][28] Entonox is frequently used by EMS personnel in the prehospital environment.[30] However, there is little evidence about its effectiveness.[28][31]

Hospital care

Hospital care of chest pain begins with initial survey of a person's vital signs, airway and breathing, and level of consciousness.[1][8] This may also include attachment of ECG leads, cardiac monitors, intravenous lines and other medical devices depending on initial evaluation.[8] After evaluation of a person's history, risk factors, physical examination, laboratory testing and imaging, management begins depending on suspected diagnoses.[8] Depending upon the diagnosis, a person may be placed in the intensive care unit, admitted to the hospital, or be treated outpatient.[8] For persons with suspected cardiac chest pain or acute coronary syndrome, or other emergent diagnoses such as pneumothorax, pulmonary embolism, or aortic dissection, admission to the hospital is most often recommended for further treatment.[8]

Outpatient care

For people with non-cardiac chest pain, cognitive behavioral therapy might be helpful on an outpatient basis. A 2015 Cochrane review found that cognitive behavioral therapy might reduce the frequency of chest pain episodes the first three months after treatment.[32] For persons with chest pain due to gastroesophageal reflux disease, a proton-pump inhibitor has been shown to be the most effective treatment.[33] However, treatment with proton pump inhibitors has been shown to be no better than placebo in persons with noncardiac chest pain not caused by gastroesophageal reflux disease.[33] For musculoskeletal causes of chest pain, manipulation therapy or chiropractic therapy, acupuncture, or a recommendation for increased exercise are often used as treatment.[33] Studies have shown conflicting results on the efficacy of these treatments.[33] A combination therapy of nonsteroidal anti-inflammatory drugs and manipulation therapy with at-home exercises has been shown to be most effective in treatment of musculoskeletal chest pain.[9]

Epidemiology

Chest pain is a common presenting problem. Overall chest pain is responsible for an estimated 6% of all emergency department visits in the United States and is the most common reason for hospital admission.[19] Chest pain is also very common in primary care clinics, representing 1-3% of all visits.[34] The rate of emergency department visits in the US for chest pain decreased 10% from 1999 to 2008.[35] but a subsequent increase of 13% was seen from 2006 to 2011.[36] Less than 20% of all cases of chest pain admissions are found to be due to coronary artery disease.[37] The rate of chest pain as a symptom of acute coronary syndrome varies among populations based upon age, sex, and previous medical conditions.[20] In general, women are more likely than men to present without chest pain (49% vs. 38%) in cases of myocardial infarction.[20]

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