â– STRUCTURAL ANATOMY: A vascular branch of the first part of the Subclavian Artery, formerly called the Internal Mammary Artery (IMA).
â– DETAILED COURSE:
1. Descends vertically behind the clavicle and the first 6 costal cartilages, running about 1.2 cm lateral to the lateral margin of the sternum.
2. It projects Anterior Intercostal Arteries to the first 6 intercostal spaces.
3. Termination (6th intercostal space): Divides into two terminal branches:
- Musculophrenic Artery (supplies the diaphragm and lower spaces).
- Superior Epigastric Artery (runs in the rectus sheath of the abdominal wall).
â– CLINICAL COMPLICATIONS:
Delayed or incomplete treatment triggers cascading systemic strain, involving downstream organ failure, severe metabolic imbalances, or progressive tissue necrosis.
â– MOLECULAR PATHWAY DYNAMICS:
Intracellular cascades undergo profound modifications, altering secondary transcription levels and receptor presentation on cellular membranes.
[HY-BOARD-1067]
🌟 Dynamic Clinical Key:
Highly valued in cardiothoracic surgery. The Left Internal Mammary Artery (LIMA) is harvested and diverted to serve as a bypass graft for the Left Anterior Descending (LAD) coronary artery. It possesses exceptional long-term patency rates compared to saphenous vein grafts. Early aggressive resuscitation is key to prevent irreversible multi-system organ dysfunction. Therapeutic molecules targeting upstream signaling components demonstrate superior efficacy profiles.