What to Expect During Cardiac Angiography and Catheterization?

Phase 1: Preparation Before Surgery

Proper pre-procedural preparation is essential for patient safety and clinical success:

Skin & Allergy Checks: Skin preparation is performed alongside mandatory iodine allergy and penicillin skin tests.

Fasting: Patients must fast for 6 hours prior to the operation to prevent nausea, vomiting, and potential aspiration caused by contrast media.

Medication: Tranquilizers like barbiturates or diazepam may be administered beforehand.

Anesthesia: Adults typically receive local anesthesia using 1% procaine or 1% lidocaine. Infants and young children require intravenous or intensive anesthesia combined with local anesthesia.

Phase 2: Intraoperative Management

During the procedure, precise catheter manipulation and rigorous anticoagulation are critical:

Vascular Access: Cardiac catheters are generally inserted into the femoral artery and vein. For children with difficult punctures, surgeons may cut down on the saphenous or cephalic vein, or cut down on subcutaneous arteries for access.

Anticoagulation & Flushing: To prevent clotting, catheters are continuously flushed and dripped with heparin saline (40 mg of heparin in 500 mL). For left ventricular procedures, 0.5 mL/kg of heparin is administered to prevent thrombosis and embolism.

Post-Angiography Hemostasis: After imaging, catheters are withdrawn, and manual pressure is applied to stop bleeding. Arterial punctures require thorough hemostasis to prevent hematoma formation. Incisions for cutdowns involve ligating veins distally and suturing arteries with non-invasive vascular sutures before skin closure.

Phase 3: Postoperative Care & Monitoring

Recovery requires vigilant tracking of vital signs and patient status:

Vital Sign Monitoring: Cardiovascular patients must be monitored for the first 4 to 6 hours for changes in heart rate, respiration, blood pressure, and body temperature to detect heart function shifts, arrhythmias, or contrast reactions early.

Hydration & Contrast Elimination: Awake patients are encouraged to drink fluids, while anesthetized patients receive intravenous fluids to promote renal excretion of the contrast media.

Bed Rest Protocols: Patients with femoral vein punctures require 24 hours of bed rest, while femoral artery puncture patients need 36 hours of bed rest to prevent hematomas or dissecting aneurysms. Wound sites must also be regularly checked for oozing blood.

Phase 4: Diagnostic Applications (Radiography Types)

Cardiac catheterization and angiography are vital tools for diagnosing and evaluating several major cardiovascular conditions:

Right Heart Radiography: Confirms congenital heart disease diagnoses pre-surgery, clarifies the nature of heart murmurs to guide treatment, and assesses patients experiencing recurring symptoms who require repeat surgeries.

Left Heart Radiography: Diagnoses conditions such as mitral or aortic valve stenosis/insufficiency, congenital heart defects, primary cardiomyopathy, and left ventricular aneurysms.

Coronary Angiography: Applied for recurrent severe angina pectoris, post-myocardial infarction angina, follow-ups after coronary artery bypass grafting, coronary congenital malformations, and cases of clinically suspected coronary heart disease with atypical symptoms.

Clinical Excellence: Combining rigorous pre-operative protocols, meticulous intraoperative technique, and structured post-operative monitoring ensures that cardiac catheterization remains a cornerstone of safe and accurate cardiovascular diagnostics.