Police captain Jeffers had a myocardial infarction. He has an ejection fraction

Question

Police captain Jeffers had a myocardial infarction. He has an ejection fraction of only 25%. What type of treatment can be used to increase cardiac output for the police captain? SELECT ALL that apply. G beta-adrenergic blocker norepinephrine acetylcholine venous constriction (increase venous return) stimulating the cardio-inhibitory center thyroxine calcium channel blocker calcium channel activator An increase in stroke volume by the sympathetic nervous system is a: positive inotropic effect. negative inotropic effect.

Explanation / Answer

Mechanism: - Norepinephrine is the ligand that binds with the alpha, beta-adrenergic receptors. Alpha-1 get paired with Gq (activate phopholipase) that releases the calcium ion and cause smooth muscle movement. Alpha-2 subunit binds with the Gi subunit (inhibit the production of cAMP to ATP) which cause the neurotransmitter level down. This mechanism followed for the heart muscle contraction and relaxation.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---