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Diagnosis Wikidoc: Chest Pain no ST elevation

Introduction

There are 4 other Life Threatening Diseases to Exclude Immediately:

1. Aortic Dissection
  • Supportive symptoms and signs include the following:
    • Back pain in 67% of cases
    • Diminution or absence of pulses in 40% of case
    • Coma, altered mental status, Cerebrovascular accident (CVA) and vagal episodes are seen in up to 20%
    • Descending dissection can lead to splanchnic ischemia, renal insufficiency, lower extremity ischemia or pulse deficits or focal neurologic deficits due to spinal cord ischemia.
  • Chest X-Ray Abnormalities Include:
    • An increased aortic diameter is the most common CXR finding, seen in up to 84% of patients.
    • A widened mediastinum is the next most common finding, seen in 15-20%.
    • Normal in 17%.
    • Pleural effusion (hemothorax) in the absence of CHF can also be another clue to dissection.
  • Next Study to Do:
    • MRI is currently thought to be the most sensitive noninvasive method of making the diagnosis of aortic dissection. As with CT, the diagnosis is made upon visualization of a double lumen with a visible flap. Sensitivity and specificity are both thought to be 98%, and the site of entry can be visualized in 85% of cases.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Cafer Zorkun, M.D., Ph.D. [2] Sahar Memar Montazerin, M.D.[3] Laith Adnan Allaham, M.D.[4]

2. Pulmonary Embolism
  • Supportive symptoms include:
  • Supportive laboratory studies include:
    • D-dimers are formed by the degradation of fibrin clot.
    • Almost all patients with PE have some endogenous fibrinolysis, and therefore have elevated levels of D-dimer.
    • Many other processes, such as pneumonia, congestive heart failure (CHF), myocardial infarction (MI), malignancy, and surgery, are also associated with a mild degree of fibrinolysis, and hence an elevated D-dimer is not specific for pulmonary embolism.
    • Its negative predictive value, however, is 91 – 94%
  • Next study to do:
    • Spiral CT scanning is now a standard modality to non-invasively diagnose PE.
    • Initial studies reported sensitivities for diagnosing emboli to the segmental level (4th order branch) as high as 98%

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] The APEX Trial Investigators; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Rim Halaby, M.D. [3]

3. Tension Pneumothorax
  • Supportive signs and symptoms include”
    • Sudden shortness of breath, cyanosis (turning blue) and pain felt in the chest and/or back are the main symptoms.
    • In penetrating chest wounds, the sound of air flowing through the puncture hole may indicate pneumothorax, hence the term “sucking” chest wound.
    • The flopping sound of the punctured lung is also occasionally heard.
    • Spontaneous pneumothoraces are reported in young people with a tall stature. As men are generally taller than women, there is a preponderance among males.
    • Pneumothorax can also occur as part of medical procedures, such as the insertion of a central venous catheter (an intravenous catheter) in the subclavian vein or jugular vein. While rare, it is considered a serious complication and needs immediate treatment. Other causes include mechanical ventilation, emphysema and rarely other lung diseases (pneumonia).

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Hamid Qazi, MD, BSc [2], Feham Tariq, MD [3]

4. Esophageal Rupture
  • Supportive signs and symptoms include:
    • The classic Meckler’s triad of symptoms includes vomiting, lower chest pain, and cervical subcutaneous emphysema following overindulgence in food or alcohol, but is observed in only half of the cases.
    • The most common chest radiograph findings in spontaneous esophageal rupture (SER) are pleural effusion (91%) and pneumothorax (80%).
    • The initial sign on a plain film may be pneumomediastinum or subcutaneous emphysema.
    • Up to 12% of patients with SER may have a normal chest radiograph.
  • Next study to do:
    • Contrast-enhanced esophageal radiography is diagnostic in 75% to 85% of cases.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohamed Diab, MD [2], Ajay Gade MD[3]], Feham Tariq, MD [4], Shaghayegh Habibi, M.D.[5]

Other conditions to Consider

Other conditions to Consider

Cardiovascular

Gastrointestinal

Musculoskeletal

Pulmonary

Miscellaneous

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]