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8 Cards in this Set
- Front
- Back
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Adrenaline MOA |
Naturally occurring catecholamine. A & B effects. Peripheral vasoconstriction. |
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Amiodarone MOA |
Slow AV node discharge. Prolongs AV node conduction and refractory period. Blocks K efflux and Na channels. Vasodilation. Decreases O2 requirements. |
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Adenosine MOA |
Interrupts reentry circuit involving AV node. Inhibits AV node conduction & increases AV nodal refractory period. |
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Atropine MOA |
Anticholinergic agent. Blocks the transmission of parasympathetic impose from the vagus nerve. SA node conductivity accelerates, increases velocity through the AV node, this increasing HR. |
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Isoprenaline MOA |
B1: increases myocardial contractility & HR. B2: causes vasodilation. Increases: HR, automaticity, contractility, systolic BP, myocardial O2 demand. Decreases: diastolic BP. |
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Verapamil MOA |
Slow calcium channel blocker. Slow AV conduction. Vasodilation. Decreases HR & force of contraction, decreasing workload and O2 demand. |
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Lignocaine MOA |
Sodium channel blocker. Decreases membrane responsiveness & velocity of conduction. Decreases automaticity of the Purkinje fibres. |
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Digoxin MOA |
Decreases impulse conduction in SA & AV nodes. Increases force of contraction by inhibiting sodium and increasing cellular calcium. |
