University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

91

Pages:

1
Author:

Mariam A. A.

PULMONARY SHUNTS Physiological Shunts 2% of blood BRONCHIAL BLOOD FLOW [Diagram of lungs showing bronchial artery anastomosis with pulmonary veins.] Labels: Bronchial a. BRONCHIAL ARTERY PULMONARY VEINS ANASTOMOSIS CORONARY BLOOD FLOW [Diagram of the heart with a close-up of the heart muscle.] Labels: THEBESIAN HEART MUSCLE VEINS TO LUNGS Notes: blood rather than going in RA thebesian v. dump blood into closest chamber of the ♥ deoxygenated 'blood' goes into LV -> bypass pul. circulation & so decreases O2 in the aorta Pathological Shunts [Note in middle]: ↑P → ↓P (High Pressure to Low Pressure flow) LEFT-TO-RIGHT SHUNTS VENTRICULAR SEPTAL DEFECT [Diagram showing blood flowing from the left ventricle to the right ventricle, then to the LUNGS.] ATRIAL SEPTAL DEFECT [Diagram showing blood flowing from the left atrium to the right atrium, then to the LUNGS.] Notes: or through ductus arteriosus -> blood goes from aorta to pul a. (pulmonary artery) ↓ oxygenated blood goes through a 2nd loop ↓ RV gets extra work RIGHT-TO-LEFT SHUNTS EXAMPLE: TETRALOGY OF FALLOT [Diagram showing right-to-left ventricular shunt.] Labels: STENOSIS OF PULMONARY OUTFLOW TRACT VENTRICULAR SEPTAL DEFECT Notes: (Circled note): ↓O2 P, ↓O2 sat, blood bypassing pul. circulation reversal of Pressure [Diagram illustrating the principle of a right-to-left shunt.] Notes: ↑ RESISTANCE ↓ RIGHT VENTRICULAR PRESSURE > LEFT VENTRICULAR PRESSURE ↓ RIGHT-to-LEFT SHUNT Eisenmenger's Syndrome Notes: RP > LP (Right Pressure > Left Pressure) ↓ mixing of O2 & CO2 ↓ hypoxemia