Cardiology

Louise Mckendrick

Understanding the major structures of the heart and surrounding arteries is essential for cardiology and interventional procedures: - Aortic Arch: The portion of the aorta that bends between the ascending and descending aorta. - Left Pulmonary Artery: Carries deoxygenated blood from the right ventricle of the heart to the lungs. - Left Coronary Artery: Supplies blood to the left side of the heart; major branch includes the Left Anterior Descending Coronary Artery. - Left Descending Coronary Artery (LAD): A critical artery in the heart that supplies blood to the front and bottom of the left ventricle and the front of the septum. - Marginal Branch of Right Coronary Artery: Provides blood to the periphery of the heart and connects with the left coronary circulation. - Inferior Vena Cava: Large vein that carries deoxygenated blood from the lower body to the right atrium. - Right Coronary Artery: Supplies blood to the right side of the heart and branches into the right ventricular and posterior descending arteries. - Superior Vena Cava: Large vein that carries deoxygenated blood from the upper body to the right atrium.

Arterial Structure:
- Right Common Carotid Artery: Supplies the right side of the head and neck. - Right Subclavian Artery: Supplies blood to the right arm. - Brachiocephalic Artery: Branches into the right subclavian and the right common carotid arteries. - Ascending Aorta: Portion of the aorta that rises from the heart and gives off branches. - Coeliac Artery: Supplies blood to the stomach, liver, spleen, and pancreas. - Superior Mesenteric Artery: Supplies blood to the small intestine and part of the large intestine. - Right Renal Artery: Supplies blood to the right kidney. - Inferior Mesenteric Artery: Supplies the distal part of the colon. - Left Common Carotid Artery: Supplies the left side of the head and neck. - Left Subclavian Artery: Supplies blood to the left arm. - Arch of Aorta: Bends between the ascending aorta and descending aorta. - Thoracic Aorta: Part of the aorta that descends through the chest. - Abdominal Aorta: Continuation of the thoracic aorta into the abdomen; splits into the iliac arteries. - Left Common Iliac Artery: Supplies blood to the left leg. - Left Internal Iliac Artery: Supplies the pelvic organs. - Left External Iliac Artery: Supplies the leg.

Venous Structure:
- Common Iliac Vein: Formed by the joining of the left and right iliac veins, drains blood from the pelvis and lower limbs. - Internal Iliac Vein: Drains blood from the pelvic organs. - External Iliac Vein: Drains blood from the lower limbs. - Femoral Vein: Major vein in the thigh, draining blood from the leg. - Greater Saphenous Vein: Longest vein in the body, runs along the length of the lower limb, from the foot to the groin. - Popliteal Vein: Located behind the knee, formed by the junction of the anterior and posterior tibial veins.

Definition: Refers to a range of techniques that rely on the use of radiological image guidance to precisely target therapy. - Characteristics: Most interventional radiology (IR) treatments are minimally invasive alternatives to open and laparoscopic surgery. - Examples of Procedures:
- Cardiac Angioplasty: Procedure to open narrowed or blocked coronary arteries. - Stenting: Insertion of a stent to keep blood vessels open. - Renal artery stenosis: Treatment for narrowing of the renal artery. - Peripheral angiography: Imaging of blood vessels outside the heart and brain. - Embolization: Procedure that blocks blood flow to certain areas.

Access Points:
- Femoral Artery: Common access site due to its size and accessibility. - Brachial Artery: Alternative site for catheter access, usually in the arm.
- Coronary Arterial Access: May require arterial access through the aorta (Left Heart Catheterization) or venous access (Right Heart Catheterization).
Procedure Steps:
- Injection of a radiopaque contrast material via a radiopaque catheter. - Positioning under fluoroscopic control. - Conducted as a sterile procedure.

Potential complications include:
- Myocardial Infarction (MI): Also referred to as a heart attack. - Stroke: Risk of stroke due to emboli or vessel dissection. - Injury to the Catheterized Artery: Hematoma or dissection can occur. - Irregular Heart Rhythms (Arrhythmias): Can happen during or after the procedure. - Allergic Reactions: Possible to the dye or medications used. - Kidney Damage: Risk increases with the use of contrast material. - Excessive Bleeding: Can occur at the access site. - Infection: Risk associated with any invasive procedure.

Ensuring safety during radiological procedures includes:
- Controlled Area: Limited access to authorized personnel only. - Lead Coats: Protective garments to reduce exposure to radiation. - Lead Screens: Barriers that protect staff and patients from scatter radiation. - Thyroid Shields: Protect the thyroid gland from radiation exposure. - Time: Minimizing the time spent in the radiation field. - Distance: Maximizing the distance from the radiation source. - Collimation: Focusing the x-ray beam to reduce exposure.

Common views used in catheterization include:
- Left Anterior Oblique (LAO): Provides visualization of the left coronary artery and associated branches. - Right Anterior Oblique (RAO): Useful for imaging the right coronary artery. - Lateral View: Good for assessing structural abnormalities. - Cranio-caudal View: Displays vertical orientation of structures.
- Note: A YouTube clip is suggested for visual assistance.

Detailed views involve distinction between different segments of coronary arteries: - Main RCA: Assessment of the right coronary artery, including the right ventricular branch. - Left Coronary Artery: Visuals from the RAO and LAD including segments such as 1st diagonal, septals, and circumflex. - Left Anterior Descending (LAD): Important in identifying lesions in anterior wall heart conditions.
Right Coronary Artery: Different views highlight various branches, including obtuse marginal and posterior descending arteries.

Overview of Angioplasty Techniques:
- Detailed procedural steps necessary for effective angioplasty will vary depending on the complexity of the case, including interventional approach and use of stents.

Description of the stenting process at Nebraska Medical Center:
- Specifics about single shat deployment, overall effectiveness of stenting, and patient outcomes.