Actions of Drugs on the CVS Flashcards

1
Q

For what types of conditions of the CVS are drugs used to treat?

A
Arrhythmias
Heart Failure
Angina
Hypertension
Risk of thrombus formation
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2
Q

What effects can drugs have on the CVS?

A

Rate and rhythm of heart
Force of myocardial contraction
Peripheral resistance and blood flow
Blood volume

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3
Q

What is an arrhythmia?

A

An abnormality of heart rate or rhythm

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4
Q

Give some examples of types of arrhtyhmias

A
Bradycardia
Atrial Flutter
Atrial Fibrillation
Tachycardia (ventricular or supraventricular)
Ventricular Fibrillation
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5
Q

What are the three main causes of arrhythmia?

A

Ectopic pacemaker activity
Afterdepolarisations
Re-entry loop

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6
Q

Describe Ectopic Pacemaker Activity

A

An area of myocardium becomes damaged and is now able to spontaneously activate, generating an action potential that overrides the Sino-Atrial now

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