CVPR 04-04-14 08-09am Pericardial Disease slides - Horwitz Flashcards

1
Q

Pericardium defn./structure

A

A fibroelastic sac w/visceral & parietal layers….. The visceral layer dirtectly abuts the epicardium (outer portion of the myocardium) and is contiguous w/the pleura around the lungs…..A very small quantity of fluid is normally present between the two layers (in the pericardial space); However, in certain diseases, large quantities of fluid may accumulate there.

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2
Q

Four types of pericardial disease:

A
  1. Acute Pericarditis …. 2. Pericardial Effusion w/out hemodynamic compromise …. 3. Cardiac tamponade (excessive pericardial fluid compresses heart & reduces CO = acute emergency)…. 4. Constrictive Pericarditis (chronic process where pericardium thickens until it compresses the heart & limits CO)
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3
Q

Acute Pericarditis – Causes

A

Viral illness, CT/autoimmune disease, Uremia, Metastatic tumors

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4
Q

Acute Pericarditis – Presentation

A

Chest pain of sudden onset, often severe & sharp, varying w/position & breathing

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5
Q

Acute Pericarditis – Dx

A

Chest pain varies w/position & breathing…. Pericardial rub on cardiac exam (crackling/rubbing that sounds like it’s right up in your ears) that appear & disappear… EKG: Diffuse ST elevation…. ECHO: Pericardial fluid…. Response to anti-inflammatory agents

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6
Q

Acute Pericarditis on EKG

A

ST segment is elevated (= injury) involving most of the heart (diffuse)

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7
Q

Acute Pericarditis – Treatment

A

NSAID of choices: Ibuprofen….. other NSAIDs…. Aspirin….. Colchicine

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8
Q

Pericardial effusion – Causes

A

Viral or acute idiopathic pericarditis, Metastatic malignancy, Uremia, Autoimmune disease, HypOthyroidism

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9
Q

Pericardial effusion – mechanism of pericardial tamponade

A

While small pericardial effusions may be asymptomatic, moderate to large effusions cause high intrapericardial pressure —> compression & impaired filling of the right heart —> decreased right ventricular output [lungs are NOT congested] —> Inspiration decreases pressure, allowing increased RV filling, but since it can’t expand in the free wall, it impinges on the LV —> decreased stoke volume, paradoxical pulse, fall in systolic pressure during inspiration, ACUTE EMERGENCY

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10
Q

Pericardial effusion – Symptoms

A

Asymptomatic w/small effusion & minimal intrapericardial pressure…. Cardiac tamponade w/ large effusion & high intrapericardial pressure = decrease SV, paradoxical pulse w/fall in systolic pressure >10mmHg during inspiration (EMERGENCY)….. NO wet lung symptoms

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11
Q

Pericardial effusion – Dx

A

Best diagnosed by X-ray or esp. Echocardiogram; Also ECG findings…. X-ray = Enlarged heart W/OUT congested lung field…. ECHO: Collapse of Rt. Atrium and Rt. Ventricle in end-diastole + Dilation of inferior vena cava w/out the normal >50% reduction during inspiration (intrapericardial & venous pressures are very high)….. ECG: Nonspecific = Low voltage w/sinus tachycardia + Electrical alternans reflecting movement of heart back & forth w/in sea of fluid w/each beat (seen as decreased QRS every other beat)

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12
Q

Pericardial effusion/tamponade vs. Dilated cardiomyopathy

A

Pericardial effusion/tamponade presents with enlarged heart and UN-CONGESTED lungs (b/c of decreased RV output as a result of pressure)….. Dilated cardiomyopathy presents with a dilated heart associated w/pulmonary venous congestion, edema, etc.

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13
Q

Constrictive Pericarditits – Mechanism/Pathophysiology

A

Cardiac surgery, Radiation, Infection —> SCARRING & LOSS of ELASTICITY of the pericardium (usually takes time to develop, even years) —> Impaired diastolic filling w/normal systolic function

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14
Q

Constrictive Pericarditits –Presentation

A

MARKEDLY elevated JVP (some of the highest you’ll see)….. ALWAYS Tachycardia….. often Hepatomegaly, Edema, Ascites (from hig venous pressure; often misdiagnosed as liver disease)….. Lungs NOT congested b/c constriction selectively impairs filling of RV (low output)

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15
Q

Constrictive Pericarditits –Dx

A

Echocardiogram or X-ray ….. Normally-size cardiac silhouette encased by thickened (or calcified) pericardium; Lungs NOT congested (selective RV filling impairment)….. MRI/CT also see pericardial thickening

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16
Q

Constrictive Pericarditits –filling curve

A

Filling occurs very abruptly in early diastole, w/little or no further filling later in diastole, unlike in normal filling curves (“Dip & Plateau” or “square root sign”)….. Also, the diastolic filling pressures are very high & equalized between Rt. & Lt. ventricles, whereas normally, diastolc RV pressure is much lower than diastolic LV pressure

17
Q

Constrictive Pericarditits –Treatment

A

Surgical stripping of the pericardium (hard procedure, but completely cures)

18
Q

Pericardial pain – distinguishing features

A

Pericardial pain is (1) “pleuritic” (aggravated by deep breathing) & (2) “positional” (relieved by sitting up or other postural changes)

19
Q

Pericardial pain vs. Acute coronary syndrome pain

A

Pain from acute coronary syndromes is not altered by breathing, cough or positional changes, as pericardial pain is

20
Q

Pericardial pain vs. Acute Pulmonary Embolism pain

A

Both may be pleuritic (aggravated by deep breathing/cough)…..BUT, Acute PE lacks ECG changes of pericarditis, lacks a pericardial rub, and often occurs in conjunction w/recent surgery or after long automobile/plane travel in which DVT (often w/localized tenderness) occurs in the lower extremities

21
Q

Pericardial pain vs. Pneumonia pain

A

Both may be pleuritic (aggravated by deep breathing/cough)…..BUT, pneumonia often has localized rales in the lung fields & sputum production

22
Q

Pericardial Tamponade vs. Congestive Heart Failure - features in common

A

Both may have Distended neck veins, Tachycardia, HypOtension, Large cardiac silhouette on xray

23
Q

Pericardial Tamponade vs. Congestive Heart Failure - timing of impairment

A

Tamponade = major impairment is in right heart filling during diastole ….. CHF = usually no impairment in right heart filling

24
Q

Pericardial Tamponade vs. Congestive Heart Failure - lung findings

A

Tamponade = NO lung congestion ….. CHF = diminished myocardial function causes congestion systemically and in lungs (rales, redistribution of blood flow to upper lobes)

25
Q

Pericardial Tamponade vs. Congestive Heart Failure – Pulse findings

A

Pulsus paradoxus & Low voltage/Pulsus alternans common in tamponade & rare in CHF….. Pulsus paradoxus = decrease >10mmHg in systolic pressure/amplitude during inspiration ….. Pulsus alternans = alternating strong & weak beats (LV systolic impairment)

26
Q

Pericardial Tamponade vs. Congestive Heart Failure – auscultation/palpation of the heart

A

Tamponade = heart sounds tend to be distant, apex may not be palpable….. CHF = more common to have normal heart sounds often w/murmurs & an S3, as well as the presence of ventricular lifts

27
Q

Pericardial Tamponade vs. Congestive Heart Failure - Echocardiograms

A

Tamponade = large pericardial effusion, right atrial collapse, lack of normal decrease in inferior vena cava diameter ….. CHF = poor contractile function, dilation of the ventricles w/out the distinctive tamponade findings

28
Q

Pericardial Tamponade vs. Constrictive Pericarditis – features in common

A

Reduced diastolic function w/ preserved systolic function. ….. JVD…. Tachycardia…. Tendency to hypotension

29
Q

Pericardial Tamponade vs. Constrictive Pericarditis – on x-ray

A

Tamponade = large cardiac silhouette on xray….. Constrictive pericarditis = silhouette is often normal & may have pericardial thickening/calcification

30
Q

Pericardial Tamponade vs. Constrictive Pericarditis – Pulse findings

A

Pulsus paradoxus is present in tamponade & uncommon in constriction.

31
Q

Pericardial Tamponade vs. Constrictive Pericarditis – time to develop

A

Tamponade = tends to develop more quickly….. Constrictive pericarditis = typically develops very slowly over considerable time

32
Q

Pericardial Tamponade vs. Constrictive Pericarditis – systemic findings

A

Constrictive pericarditis = often accompanied by hepatic congestion, ascites & marked pedal edema ….. these findings are uncommon in tamponade which tends to develop more quickly.

33
Q

Pericardial Tamponade vs. Constrictive Pericarditis. - Echocardiogram

A

Tamponade = Pericardial fluid, Right atrial collapse w/inspiration ….. absent in Constrictive pericarditis