Cardiac Catheterization II: Right Heart Catheterization

Right heart catheterization commonly uses the brachial, internal jugular, femoral, and antecubital veins as access sites. These veins drain directly into the right atrium, allowing smooth passage of the catheter into the right heart and pulmonary artery. The choice of vein depends on clinical indications and patient anatomy.

During right heart catheterization, clinicians obtain pressure measurements from the right atrium, right ventricle, and pulmonary artery, along with oxygen saturation readings. These hemodynamic measurements help assess right heart and pulmonary circulation function. Pulmonary artery pressures specifically diagnose pulmonary hypertension and guide management of cardiovascular conditions.

After obtaining venous access with a needle and guidewire technique, a sheath is placed into the vein. The pulmonary artery catheter, typically 110 cm long and 5F to 8F in size, is advanced through the sheath under fluoroscopic guidance. Continuous fluoroscopy monitoring ensures accurate placement through the right atrium and right ventricle into the pulmonary artery while avoiding complications.

Complications include arrhythmias from catheter contact with the endocardium and venous spasms from vessel irritation. Additional risks involve infection at the insertion site, right heart perforation, and air embolism if air enters the catheter or pressure transducers. Patients should monitor for increased pain, swelling, redness at the access site, or symptoms like shortness of breath.

The patient is positioned supine on the cardiac catheterization lab table and given sedatives for comfort and relaxation. The access site is cleaned and draped using sterile technique, and local anesthetic is administered. Informed consent is obtained before the procedure begins to ensure the patient understands the risks and benefits.

After obtaining necessary measurements, the catheter is carefully withdrawn and the sheath is removed. Pressure is applied to the access site to prevent bleeding, and the site is dressed with a sterile bandage. The patient is monitored for immediate complications in the recovery area, with vital signs assessed and the access site observed for bleeding or infection.

Yes, a biopsy of myocardial tissue can be obtained during right heart catheterization to diagnose the etiology of cardiomyopathy or heart transplant rejection. This additional diagnostic capability makes the procedure valuable for patients requiring tissue analysis to guide treatment decisions and assess cardiac function abnormalities.