Pericarditis with Left Arm Pain

Classical Presentation and Diagnostic Approach

• The American College of Cardiology and European Heart Society note that pericarditis typically presents with sharp, pleuritic chest pain that is often retrosternal and may improve with sitting up or leaning forward 1, 2
• The European Heart Society guidelines state that the chest pain of pericarditis is typically central and can radiate to the neck, back, or left shoulder, but specific left arm radiation is not a classical feature 2
• In cases of myopericarditis, the clinical presentation may include left arm pain similar to that seen in acute coronary syndromes, according to the European Heart Journal 2, 3
• The 2015 ESC Guidelines note that myopericarditis can present with chest pain that has features of both pericarditis and myocardial ischemia 2

Diagnostic Differentiation from Myocardial Infarction

• The European Heart Journal states that left arm pain is a classic symptom of myocardial infarction, making differentiation important 4
• The American College of Cardiology notes that in pericarditis, the pain is typically sharp and pleuritic, changes with posture, and may be accompanied by a friction rub 1, 2, 5
• Electrocardiographic differences are crucial, with pericarditis showing widespread concave ST elevation and PR depression, and myocardial infarction showing localized convex ST elevation 1

Diagnostic Approach and Clinical Implications

• The European Heart Journal recommends coronary angiography in cases of pericarditis with suspected myocardial involvement to rule out acute coronary syndromes, especially when left arm pain is a prominent feature 2, 3
• The American College of Cardiology states that cardiac MRI with gadolinium contrast is effective to distinguish myopericarditis from other causes, including myocardial infarction with nonobstructive coronary arteries 1, 5
• The American College of Cardiology recommends transthoracic echocardiography to assess for pericardial effusion, ventricular wall motion abnormalities, and other cardiac findings 1, 5
• The European Heart Journal notes that the presence of left arm pain in a patient with suspected pericarditis should raise suspicion for myocardial involvement 2, 3
• Hospitalization is recommended for diagnosis and monitoring of patients with suspected myopericarditis, especially when presenting with atypical features like left arm pain 3

Diagnosis and Management of Acute Pericarditis

Clinical Presentation

• Sharp, pleuritic chest pain that typically changes with inspiration and position is present in approximately 90% of cases, according to the European Society of Cardiology 6, 7
• Pericardial friction rub is highly specific but only audible in approximately one-third of patients, as noted by the American Heart Association 6, 8
• ECG changes including diffuse concave upward ST-segment elevation and PR-segment depression are characteristic of acute pericarditis, as reported by the American College of Cardiology 6, 8
• Presence of pericardial effusion is detectable in only about 60% of cases, according to the European Heart Journal 6

Optimal Technique for Detecting Pericardial Friction Rub

• The pericardial friction rub is best heard with the patient sitting upright and leaning forward while briefly holding their breath, as recommended by the American Heart Association 8, 9
• This position brings the heart closer to the chest wall and minimizes lung sounds, allowing for better detection of the friction rub, as noted by the American College of Cardiology 8

Diagnostic Approach

• Listen for the friction rub in the optimal position (sitting, leaning forward, brief breath hold) to increase the chances of detection, as suggested by the European Society of Cardiology 8, 9

Common Pitfalls and Caveats

• A normal echocardiogram does not exclude the diagnosis of pericarditis, as stated by the European Heart Journal 6
• Pericardial effusion is only detectable in about 60% of cases, highlighting the importance of clinical evaluation, as reported by the European Society of Cardiology 6
• When elevated cardiac troponin is detected (up to 50% of patients with acute pericarditis), the term perimyocarditis is applicable, according to the European Heart Journal 6
• Pericardial thickening (>3 mm) may be present in some cases, as noted by the European Society of Cardiology 6

Pericardial Friction Rubs: Characteristics and Clinical Significance

Clinical Significance

• Pericardial friction rubs are highly specific but transient sounds heard in approximately one-third of patients with acute pericarditis, making them an important diagnostic criterion when present, according to the European Society of Cardiology 10
• Friction rubs can be transient and may disappear and reappear during the course of pericarditis, making repeated examinations necessary, as recommended by the European Heart Journal 11
• Presence of a pericardial friction rub is one of the four key diagnostic criteria for acute pericarditis, along with characteristic chest pain, ECG changes, and pericardial effusion, as stated by the European Society of Cardiology 12

Detection Techniques

• Multiple auscultatory examinations may be necessary as the rub can be intermittent, as noted by the European Heart Journal 11

Clinical Context

• In the setting of acute pericarditis, the friction rub is often accompanied by characteristic chest pain that radiates to the trapezius ridge, as described by the European Heart Journal 11
• Transthoracic echocardiography is essential in all patients with suspected pericarditis to detect effusion and evaluate for complications, regardless of whether a friction rub is present, according to the European Society of Cardiology 10

Pericarditis Diagnosis and Management

Introduction to Pericarditis

• The American College of Cardiology recommends that an electrocardiogram (ECG) should be performed immediately, within 10 minutes of arrival, in any patient with acute chest pain 13
• The American College of Cardiology states that troponin levels can be elevated in up to 50% of cases of acute pericarditis, indicating perimiopericarditis 13
• The European Heart Journal suggests that a chest radiograph is essential to evaluate cardiomegaly, which may suggest a large pericardial effusion, and to rule out other intrathoracic causes 14

Diagnostic Criteria for Pericarditis

• The American College of Cardiology indicates that an ECG can show diffuse ST elevation (concave upwards) and PR depression in pericarditis 15
• The American College of Cardiology recommends that an urgent transthoracic echocardiogram (TTE) should be performed in all patients with suspected pericarditis to detect pericardial effusion and evaluate for cardiac tamponade 15
• The Journal of the American College of Cardiology suggests that cardiac magnetic resonance (CMR) imaging is the most sensitive study for confirming myocardial and pericardial inflammation, with a sensitivity of 94-100% for detecting pericardial inflammation 16

Management of Pericarditis

• The American College of Cardiology recommends that patients with suspected pericarditis should undergo immediate studies, including ECG, troponin, and chest radiograph 13
• The Circulation journal suggests that if the initial studies are normal, consideration should be given to non-cardiac causes, and a stress test may be performed within 3 days if there is suspicion of ischemia 17
• The American College of Cardiology states that hospital admission is required if there is elevated troponin, ischemic changes on ECG, pericardial effusion on echocardiogram, hemodynamic instability, ventricular arrhythmias, or persistent fever 17

Detection of Pericardial Friction Rub

Optimal Auscultation Technique

• The American College of Cardiology suggests that the pericardial friction rub may be audible across multiple precordial areas but is typically most prominent at the left lower sternal border 18
• The friction rub can be more pronounced when the patient is supine in some cases, though the sitting-leaning-forward position is generally optimal for detection, as noted by the American College of Cardiology 18

Clinical Characteristics and Detection Challenges

• The American College of Cardiology indicates that the absence of a friction rub does not exclude the diagnosis of pericarditis, as it is only audible in less than one-third of confirmed pericarditis cases 18

Diagnosis of Acute Pericarditis

Clinical Characteristics

• The friction rub is highly specific but transient, being audible in only approximately one-third of patients with confirmed acute pericarditis, according to the European Society of Cardiology 19
• The rub can be mono-, bi-, or triphasic in character, as reported by the European Heart Journal 20, 21
• The friction rub is one of four key diagnostic criteria for acute pericarditis, with at least two criteria required for diagnosis, including characteristic chest pain, ECG changes, and pericardial effusion, as stated by the European Society of Cardiology 21

Diagnostic Approach

• When a friction rub is present in the setting of acute myocardial infarction accompanied by persistent pain, hypotension, or nausea, urgent echocardiography is indicated, as recommended by the European Society of Cardiology 19

Diagnosis and Detection of Pericardial Friction Rub

Clinical Characteristics

• The pericardial friction rub can be mono-, bi-, or triphasic in character, with the triphasic rub being most characteristic, as noted by the European Society of Cardiology 22, 23
• The rub is highly specific but transient, being audible in only approximately one-third of patients with confirmed acute pericarditis, according to the European Heart Journal 23
• The friction rub can disappear and reappear during the course of pericarditis, making multiple auscultatory examinations necessary, as recommended by the European Society of Cardiology 23

Optimal Detection Methods

• The friction rub can be heard along the lower left sternal border extending to adjacent precordial areas, with the left lower sternal border consistently providing the highest yield, as reported in the European Heart Journal 22

Pericardial Friction Rub in Acute Pericarditis

Diagnostic Yield and Clinical Significance

• The pericardial friction rub is audible in roughly one‑third of patients with confirmed acute pericarditis, making its absence insufficient to rule out the disease. 24
• When present, the rub is highly specific for acute pericarditis but may be transient, disappearing and reappearing during the illness, which necessitates repeated auscultatory examinations. 24

Acoustic Characteristics of the Rub

• The friction rub may be mono‑, bi‑, or triphasic; the triphasic pattern is considered the most characteristic manifestation of pericarditis. 25

Optimal Auscultation Technique

• Repeated auscultation throughout the clinical encounter improves detection because the rub can be intermittent. 24

Associated Auscultatory Findings

• Diminished or muffled heart sounds are commonly observed in patients with moderate to large pericardial effusions, reflecting fluid accumulation around the heart. 24
• The emergence of a new third heart sound (S3) may indicate concurrent myocardial involvement (perimyocarditis). 25
• Normal heart sounds are typical in patients without hemodynamic compromise or significant pericardial effusion. 24

Imaging Recommendations

• Transthoracic echocardiography is recommended for all patients with suspected acute pericarditis, irrespective of the presence or absence of a friction rub, to detect pericardial effusion and assess for tamponade. 24

Diagnostic Pitfalls in Acute Pericarditis

Misuse of Nitroglycerin Response

• Relief with nitroglycerin should not be used as a diagnostic criterion for acute pericarditis, because a positive response does not confirm nor exclude pericarditis or myocardial ischemia. 26

Pericardial Friction Rub Persistence and Special Population Presentations in Acute Pericarditis

Pericardial Friction Rub

• The pericardial friction rub may remain audible even when a large pericardial effusion is present, highlighting that its presence does not exclude significant fluid accumulation. 27

Uremic/Dialysis‑Associated Pericarditis

• A substantial proportion of patients with uremic or dialysis‑related pericarditis are asymptomatic despite having pericardial inflammation. 27
• During cardiac tamponade in this population, heart rate can remain relatively low (approximately 60–80 beats/min) because autonomic dysfunction blunts the usual tachycardic response, even in the setting of fever and hypotension. 27
• Electrocardiograms in uremic pericarditis typically lack the diffuse ST‑segment and T‑wave elevations seen in classic acute pericarditis, reflecting the absence of concurrent myocardial inflammation. 27
• The pericardial friction rub may be persistent or transient, and can be heard despite the presence of large effusions. 27

Tuberculous Pericarditis

• Tuberculous pericarditis exhibits a highly variable clinical spectrum, including:

Diagnostic Criteria and Workup for Acute Pericarditis

Diagnostic Criteria (≥ 2 Required)

• The European Society of Cardiology defines acute pericarditis as requiring any two of the following four clinical features: pericarditic chest pain, pericardial friction rub, new widespread ST‑segment elevation or PR‑segment depression on ECG, or a new/worsening pericardial effusion 28.
• Pericarditic chest pain is sharp, pleuritic, retrosternal and often radiates to the neck, back, or left shoulder (characteristic “trapezius ridge”) 29.
• Pericardial friction rub is a highly specific but transient auscultatory finding, present in ≈ 30 % of patients with acute pericarditis 28.
• Electrocardiographic changes:
  
  • New, diffuse, concave‑upward ST‑segment elevation without reciprocal changes 28.
  • PR‑segment depression in multiple leads 28.
  • These ECG patterns reflect epicardial inflammation because the parietal pericardium is electrically inert 28.
• Pericardial effusion detected by imaging occurs in ≈ 60 % of cases and may be new or worsening 28.

Immediate Diagnostic Tests

• Transthoracic echocardiography should be performed in all patients with suspected pericarditis to identify effusion, assess for tamponade, and evaluate ventricular function 28.
• Chest radiography is usually normal; it becomes abnormal only when the effusion exceeds roughly 300 mL 28.

Laboratory Findings

• Inflammatory markers (C‑reactive protein, erythrocyte sedimentation rate, white‑blood‑cell count) are elevated in the majority of cases and are useful for monitoring disease activity and therapeutic response 28.
• Cardiac biomarkers (troponin, creatine kinase) are elevated in up to 50 % of patients, indicating concurrent myocardial involvement (myopericarditis) rather than isolated pericardial disease 28.

Diagnostic Algorithm

Differential Diagnosis

• The principal ECG differential is acute coronary syndrome, which typically shows localized convex ST‑segment elevation with reciprocal changes, contrasting with the diffuse concave pattern of pericarditis 28.