Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels. This technique diagnoses congenital heart disease, coronary artery disease, valvular heart disease, and coronary spasms and assesses ventricular function. It helps guide treatment decisions, including the need for revascularization procedures like percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and other interventions to manage structural defects of the heart valves or septum. Additionally, intracardiac pressures and oxygen levels can be measured directly. Ejection fraction (EF) is assessed indirectly through imaging techniques such as echocardiography rather than catheterization. Using contrast media and fluoroscopy during the procedure enables visualization of the coronary arteries, delineation of heart chambers, and wall motion assessment.
Cardiac catheterization involves inserting radiopaque catheters into the heart's right and left chambers through a major vein and artery. Fluoroscopy is used to navigate these catheters, known as right and left heart catheterization. Right heart catheterization typically comes before left heart catheterization. However, in cases where only myocardial biopsies or pulmonary artery pressure evaluations are needed, right heart catheterization alone may suffice. It is important to note that left heart catheterization requires a contrast agent to visualize the coronary arteries' patency and evaluate left ventricular function.
Before the procedure, patients undergo various blood tests to evaluate metabolic and renal function. Baseline coagulation studies, including prothrombin time, activated partial thromboplastin time, and international normalized ratio, are essential for guiding anticoagulation dosage during the procedure. Establishing baseline values and monitoring blood loss post-procedure by performing a complete blood count, including hematocrit and platelets, is necessary to mitigate the risks of bleeding or hematoma formation. A thorough health history is also obtained to check for previous reactions to contrast agents and assess the risk for contrast-induced nephropathy (CIN), which is typically reversible acute kidney injury. Patients at risk for CIN include those with chronic kidney disease, nephrotoxic medication use, dehydration, heart failure, and hypotension.
During cardiac catheterization, patients receive one or more IV catheters to administer fluids and medications like sedatives and heparin. Continuous monitoring for dyspnea, chest pain, blood pressure changes, and ECG alterations is critical, as these may indicate myocardial ischemia, hemodynamic instability, or arrhythmias. Ensure resuscitation equipment is easily accessible and ready for advanced cardiac life support.
Post-procedure, patients require bed rest for 2 to 6 hours before ambulating. The length of bed rest needed after a procedure depends on factors like the size of the catheter, the site of insertion (femoral or radial artery), anticoagulation status, and other factors like age and bleeding disorders.
Complications of cardiac catheterization can include hematoma at the puncture site, bleeding, allergic reactions to contrast media, catheter looping or kinking, thrombus formation, aortic dissection, dysrhythmias, myocardial infarction, stroke, infection, puncture of the septum, ventricles, or lung tissue.
Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels.
It helps guide treatment decisions, such as determining the need for revascularization procedures like coronary artery bypass grafting.
The procedure involves inserting catheters through a major vein, such as the femoral vein, and a major artery, such as the radial artery, often using radiopaque contrast agents.
Fluoroscopy guides these catheters into the right and left heart chambers, known as right and left heart catheterization.
Both are typically performed together, but right heart catheterization alone may suffice for procedures like myocardial biopsies.
Before the procedure, check for previous reactions to contrast agents.
Patients undergo various blood tests to assess metabolic and renal function, including serum electrolytes and creatinine levels.
Baseline coagulation studies, such as prothrombin time and international normalized ratio, are performed to guide anticoagulation dosage during the procedure.
A complete blood count, including hematocrit levels, is also necessary to monitor for blood loss post-procedure.
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