Term
| QT interval is prolonged by what electrolyte imbalance? |
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Definition
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Term
| Blockage of the circumflex artery will affect what area of the heart? Which leads will show this best? |
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Definition
| The lateral area; leads aVL, V5-V6 |
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Term
| Which nerve carries impulses from the carotid baroreceptors? |
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Definition
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Term
| Which nerve carries impulses from the aortic arch baroreceptors? |
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Definition
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Term
| Nitric oxide is derived from which amino acid? |
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Definition
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Term
| Nitric oxide stimulates production of which second messenger? |
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Definition
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Term
| Dobutamine causes increased contractility via which second messnger increase? |
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Definition
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Term
| What is the resting potential of the cardiac ventricular cell? |
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Definition
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Term
| What is the resting potential of the SA nodal cells? |
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Definition
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Term
| What phases are missing in nodal cell action potentials? |
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Definition
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Term
| Which phase does digitalis work on to slow heart? |
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Definition
| Phase 4 (poisons the Na/K pump) |
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Term
| On what phase do CCB's work to slow heart rate? |
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Definition
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Term
| On what phase does lidocaine work to control ventricular dysrhythmias? |
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Definition
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Term
| On what phase do CCBs work in cardiac myocytes? |
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Definition
| in phase 2 (clinically insignificant) |
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Term
| What will you see on EKG with a RBBB? |
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Definition
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Term
| What will you see on EKG with a LBBB? |
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Definition
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Term
| What does hypocalcemia do to QT interval? |
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Definition
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Term
| What does hypercalcemia do to QT interval? |
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Definition
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Term
| What do u-waves represent? |
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Definition
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Term
| How is WPW syndrome seen on an EKG? What drugs should be avoided? |
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Definition
| Short PR interval; avoid Dig and verapamil |
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Term
| Which leads represent the posterior and inferior walls? |
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Definition
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Term
| Which leads represent the septum and anterior wall? |
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Definition
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Term
| Which leads represent the lateral wall? |
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Definition
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Term
| What enzyme produces NO from arginine? |
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Definition
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Term
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Definition
| Walls of the vascular endothelium |
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Term
| N.O. leads to an increase in what substance in the cell (causes vasodilation) |
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Definition
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Term
| What 3 things will worsen IHSS obstruction? |
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Definition
1. Decreased afterload
2. Decreased preload
3. Increased contractility |
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Term
| What are the goals for Aortic Regurg? |
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Definition
| HR 80-100, increased preload, decreased afterload |
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Term
| What are the goals for mitral regurg? |
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Definition
| HR 80-100, maintain preload, decrease afterload |
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Term
| What % of mitral regurg is associated with mild symptoms? Moderate? Sever? |
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Definition
Mild < 30%
Moderate 30-60%
Severe > 60% |
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Term
| What are the goals of treatment for aortic stenosis? |
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Definition
| HR 60-80, maintain afterload/preload |
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