[The jugular pulse in constrictive pericarditis. Correlations between hemodynamics and external recordings]

Area of Science:

• Cardiology
• Physiology
• Diagnostic Imaging

Background:

• The jugular pulse curve provides insights into right heart hemodynamics.
• Diagnosing constrictive pericarditis often relies on a combination of clinical, electrocardiographic, and imaging findings.
• Traditional analysis of jugular waveforms has limitations in accurately assessing cardiac restriction.

Purpose of the Study:

• To evaluate the diagnostic utility of jugular pulse curve contours and chronologic changes in constrictive pericarditis.
• To compare jugular waveform characteristics in patients with constrictive pericarditis versus normal controls.
• To identify specific, reliable indicators of cardiac restriction severity using jugular tracings.

Main Methods:

• Studied jugular pulse curves in 15 cases of constrictive pericarditis and 17 normal controls.
• Assessed the presence of diastolic venous collapse and overall pulse contour.
• Utilized synchronous tracings to measure specific time intervals: Q-Y, S2-Y, and S2-V.

Main Results:

• Diastolic venous collapse was present in only 8 of 15 constrictive pericarditis cases.
• Some cases with diastolic collapse showed normal pulse contours but abnormal hemodynamics.
• Specific time intervals (Q-Y, S2-Y) correlated significantly with mean right atrial pressure.
• Established normal, intermediate, and pathological zones for these intervals.
• Developed criteria for classifying constriction severity (severe, moderate, none) based on interval values.

Conclusions:

• Jugular pulse curve contour alone is insufficient for diagnosing constrictive pericarditis.
• Chronologic changes, specifically measured time intervals (Q-Y, S2-Y, S2-V), are more specific indicators of cardiac restriction.
• A grading system based on these intervals allows for accurate assessment of constrictive pericarditis severity.