[Pulmonary atresia with intact interventricular septum]

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Cardiac Surgery

Background:

• Pulmonary atresia with intact interventricular septum (PA/IVS) is a severe congenital heart defect.
• Understanding its clinical presentation and diagnostic markers is vital for patient management.

Purpose of the Study:

• To analyze clinical and diagnostic features of PA/IVS.
• To evaluate correlations between hemodynamic parameters and electrocardiographic findings.
• To highlight the role of angiocardiography in assessing PA/IVS.

Main Methods:

• Retrospective study of ten PA/IVS cases.
• Classification into Type I and Type II based on unspecified criteria.
• Clinical data collection including symptoms, physical examination, and necropsy findings.
• Hemodynamic measurements: right atrial pressure, right ventricular systolic and telediastolic pressures.
• Electrocardiographic analysis: P wave amplitude, electrical axis of the QRS (AQRS).
• Angiocardiographic assessment of ventricular size, infundibulum, and atretic segment.

Main Results:

• All ten cases exhibited cyanosis, heart failure, cardiomegaly, and pulmonary oligemia.
• No significant correlation found between right atrial pressure and P wave amplitude (r=0.014).
• No significant correlation found between AQRS and right ventricular systolic pressure (r=0.039).
• Type II cases (4/10) showed biventricular hypertrophy; one Type I case (1/6) showed right ventricular hypertrophy.
• Right ventricular hypertension was present in nine cases.
• Elevated right atrial middle pressure and right ventricular telediastolic pressure observed in nine cases.

Conclusions:

• PA/IVS necessitates comprehensive diagnostic evaluation.
• Angiocardiography is essential for precise anatomical and dimensional assessment of the defect.
• Clinical presentation is consistently severe, characterized by cyanosis and heart failure.