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Anesthesia Student Survival Guide.pdf - Index of

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PhysiOlOGy And AnesthesiA fOr CArdiAC And thOrACiC surGery ● 271<br />

be more compensated with lower pulmonary artery pressures but a low cardiac<br />

output. Medical treatment includes inotropic agents and vasodilators. Surgical<br />

treatment is with mitral valve repair or replacement. During anesthesia, avoid<br />

myocardial depression and increases in SVR (will worsen regurgitation), while<br />

maintaining a normal/high heart rate (less time for regurgitation).<br />

Aortic stenosis (AS) is caused by senile degenerative disease, congenital<br />

bicuspid aortic valve, or rheumatic heart disease. Male gender, hypercholesterolemia,<br />

and smoking are risk factors. Blood flow is obstructed during systole<br />

which results in concentric left ventricular hypertrophy. There is a fixed stroke<br />

volume and filling is 40% dependent on the atrial kick. Mild AS is a valve area<br />

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