Pericardial effusion and tamponade: Difference between revisions
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**Post-radiation | **Post-radiation | ||
**[[Myxedema]] | **[[Myxedema]] | ||
==Clinical Features== | ==Clinical Features== | ||
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*Beck's Triad (33% of patients) | *Beck's Triad (33% of patients) | ||
**Hypotension, muffled heart sounds, JVD | **Hypotension, muffled heart sounds, JVD | ||
==Differential Diagnosis== | |||
{{Template:Chest Pain DDX}} | |||
==Evaluation== | ==Evaluation== | ||
===[[Pulsus Paradoxus]]=== | |||
*>10mmHg change in systolic BP on inspiration | |||
===[[CXR]]=== | |||
[[File:Massivepericarialeffusion.png|thumb|Massive pericardial effusion on chest x-ray]] | |||
*Enlarged cardiac silhouette | |||
===[[ECG]]=== | |||
[[File:Pericardial effusion with tamponade.png|thumb|Sinus tachycardia with low QRS voltage and electrical alternans]] | |||
*Often normal | |||
*Tachycardia (bradycardia is ominous finding) | |||
*Electrical alternans | |||
*Low voltage | |||
**All limb lead QRS amplitudes <5 mm or I+II+III<15;<ref>Mattu A, Brady W. ECGs for the Emergency Physician 2, BMJ Books 2008.</ref> | |||
**'''OR''' All precordial QRS amplitudes <10 mm or V1+V2+V3<30 | |||
===[[Cardiac ultrasound|Ultrasound]]=== | ===[[Cardiac ultrasound|Ultrasound]]=== | ||
[[File:Pericardial effusion with tamponade (cropped).gif|thumb|Transthoracic echo of pericardial effusion showing "swinging heart"]] | |||
[[File:PericardialeffusionUS.png|thumb|Pericardial effusion on ultrasound]] | |||
[[File:RV_Collapse_M_mode.JPG|thumbnail|Collapse M mode]] | |||
[[File:MV_inflow_variation.JPG|thumbnail|MV inflow variation]] | |||
*Pericardial effusion | *Pericardial effusion | ||
**In acute cases, even a relatively small build up of pericardial fluid can lead to hemodynamic compromise | **In acute cases, even a relatively small build up of pericardial fluid can lead to hemodynamic compromise | ||
**Differentiate pericardial effusion from pleural effusion using the parasternal long axis view. Pericardial effusions will have an anechoic stripe between the left atrium and descending thoracic aorta. In a pleural effusion, the stripe will be seen behind the descending thoracic aorta.<ref> | **Differentiate pericardial effusion from pleural effusion using the parasternal long axis view. Pericardial effusions will have an anechoic stripe between the left atrium and descending thoracic aorta. In a pleural effusion, the stripe will be seen behind the descending thoracic aorta.<ref>Randazzo MR et al. Acad Emerg Med, 2003. PMID: 12957982</ref> | ||
Randazzo MR et al. Acad Emerg Med, 2003. PMID: 12957982</ref> | |||
*Classical ultrasound findings | *Classical ultrasound findings | ||
**Diastolic collapse of the right atrium (in atrial diastole) | **Diastolic collapse of the right atrium (in atrial diastole) | ||
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**Position in PSL view with M-mode line through where RV appears to collapse | **Position in PSL view with M-mode line through where RV appears to collapse | ||
**Allow M-mode line to pass through where the anterior MV hits the septum in diastole (much like evaluation of EPSS - see [[Formal echocardiography]]) | **Allow M-mode line to pass through where the anterior MV hits the septum in diastole (much like evaluation of EPSS - see [[Formal echocardiography]]) | ||
*Valvular pulsus parodoxus | *Valvular pulsus parodoxus | ||
**Doppler interrogation across the mitral valve will demonstrate exaggerated respiratory variability of transvalvular flow | **Doppler interrogation across the mitral valve will demonstrate exaggerated respiratory variability of transvalvular flow | ||
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***> 40% for tricuspid inflow variation | ***> 40% for tricuspid inflow variation | ||
***Helpful in thickened RV and RA from longstanding pulmonary hypertensive patients | ***Helpful in thickened RV and RA from longstanding pulmonary hypertensive patients | ||
==Management== | ==Management== |
Revision as of 20:08, 17 August 2019
Background
- Always consider in patient with PEA
- Always consider in patient with penetrating trauma anywhere in the cardiac box (80% result in tamponade)
- Gun shot wounds are less likely to result in tamponade because pericardial defect is larger
- Pathophysiology
- Increased pericardial pressure > decreased RV filling > decreased cardiac output
Etiology
- Hemopericardium
- Trauma
- Iatrogenic (misplaced central line)
- Bleeding diathesis
- Ventricular rupture (post-MI)
- Non-hemopericardium
- Cancer - most commonly lung, breast, prostate, or hematologic
- Melanoma has predilection for heart
- May be related to radiation, infection, chemotherapy
- Pericarditis
- Infectious
- Uremic (renal failure)
- HIV complications (infection, Kaposi sarcoma, lymphoma)
- SLE and other autoimmune or connective tissue disorders
- Post-radiation
- Myxedema
- Cancer - most commonly lung, breast, prostate, or hematologic
Clinical Features
- Chest pain, shortness of breath, cough, fatigue
- CHF-type appearance
- Narrow pulse pressure
- Friction rub
- Pulsus paradoxus (dec in BP on inspiration)
- Beck's Triad (33% of patients)
- Hypotension, muffled heart sounds, JVD
Differential Diagnosis
Chest pain
Critical
- Acute coronary syndromes (ACS)
- Aortic dissection
- Cardiac tamponade
- Coronary artery dissection
- Esophageal perforation (Boerhhaave's syndrome)
- Pulmonary embolism
- Tension pneumothorax
Emergent
- Cholecystitis
- Cocaine-associated chest pain
- Mediastinitis
- Myocardial rupture
- Myocarditis
- Pancreatitis
- Pericarditis
- Pneumothorax
Nonemergent
- Aortic stenosis
- Arthritis
- Asthma exacerbation
- Biliary colic
- Costochondritis
- Esophageal spasm
- Gastroesophageal reflux disease
- Herpes zoster / Postherpetic Neuralgia
- Hypertrophic cardiomyopathy
- Hyperventilation
- Mitral valve prolapse
- Panic attack
- Peptic ulcer disease
- Pleuritis
- Pneumomediastinum
- Pneumonia
- Rib fracture
- Stable angina
- Thoracic outlet syndrome
- Valvular heart disease
- Muscle sprain
- Psychologic / Somatic Chest Pain
- Spinal Root Compression
- Tumor
Evaluation
Pulsus Paradoxus
- >10mmHg change in systolic BP on inspiration
CXR
- Enlarged cardiac silhouette
ECG
- Often normal
- Tachycardia (bradycardia is ominous finding)
- Electrical alternans
- Low voltage
- All limb lead QRS amplitudes <5 mm or I+II+III<15;[1]
- OR All precordial QRS amplitudes <10 mm or V1+V2+V3<30
Ultrasound
- Pericardial effusion
- In acute cases, even a relatively small build up of pericardial fluid can lead to hemodynamic compromise
- Differentiate pericardial effusion from pleural effusion using the parasternal long axis view. Pericardial effusions will have an anechoic stripe between the left atrium and descending thoracic aorta. In a pleural effusion, the stripe will be seen behind the descending thoracic aorta.[2]
- Classical ultrasound findings
- Diastolic collapse of the right atrium (in atrial diastole)
- Diastolic collapse of the right ventricle
- Plethoric IVC
- Evaluating systolic vs. diastolic phases with M-mode
- Position in PSL view with M-mode line through where RV appears to collapse
- Allow M-mode line to pass through where the anterior MV hits the septum in diastole (much like evaluation of EPSS - see Formal echocardiography)
- Valvular pulsus parodoxus
- Doppler interrogation across the mitral valve will demonstrate exaggerated respiratory variability of transvalvular flow
- MV inflow respiratory variation, difference from highest velocity to lowest, as a percentage of highest velocity[3]
- > 25%, likely tamponade physiology
- > 40% for tricuspid inflow variation
- Helpful in thickened RV and RA from longstanding pulmonary hypertensive patients
Management
Hemorrhagic Tamponade
- Can occur if ECG read as STEMI/NSTEMI and heparin started
- Pericardiocentesis
- Temporizing measure until thoracotomy can be performed
- IVF to increase RV volume and maintain preload
- Medications
- Pressors (temporizing)
- Avoid preload reducing medications (nitroglycerin, diuretics)
Non-hemorrhagic Tamponade
- Pericardiocentesis
- Dialysis for patients with known renal failure
Disposition
- To OR if traumatic and hemodynamically unstable
- Admit with cardiology/CT surgery consult
See Also
References
- ↑ Mattu A, Brady W. ECGs for the Emergency Physician 2, BMJ Books 2008.
- ↑ Randazzo MR et al. Acad Emerg Med, 2003. PMID: 12957982
- ↑ Rajagopalan N, Garcia MJ, Rodriguez L, Murray RD, Apperson-Hansen C, Stugaard M, Thomas JD, and Klein AL. Comparison of new Doppler echocardiographic methods to differentiate constrictive pericardial heart disease and restrictive cardiomyopathy. Am J Cardiol. 2001 Jan 1;87(1):86-94.