GTN

Question 1

MOA

Answer 1

Vasodilator that acts on the smooth muscle to cause venous and arterial vasodilation

• Reduction in venous return ( preload ) reducing myocardial oxygen demand
• Arterial dilation, reduces peripheral resistance ( after load ). Force is reduced within the left ventricle reducing oxygen demand

Question 2

Indicators

Answer 2

Myocardial ischaemia
CPO

Control of hypertension with autonomic dysreflexia
Control of hypertension prior fibrinolytic treatment for STEMI
Control of hypertension for inter hospital transfer for STEMI

Question 3

Contraindications

Answer 3

Known sever allergies
Systolic lower than 100mmhg
HR faster than 150bpm
HR slower than 40bpm
Ventricular tachycardia

Question 4

Cautions

Answer 4

STEMI
-Small, frail, or physiologically unstable
-Poor perfusion
-Erectile dysfunction medication taken within last 24hrs
-Dysrhythmia
-Known atrial or mitral stenosis