Cardiac Cycle

The QRS complex on an ECG relates to which areas of the heart?

• Aorta

• Atria

• Ventricles

• Vena Cava

The T Wave on an ECG shows when the muscles

The P wave represents ​ (a)  

• atrial contraction
• atrial relaxation
• Ventricular contraction
• ventricular relaxation

Match the following

• Sinoatrial Node

• Runs down the centre of the ventricles

• Atrioventricular Node

• Positioned at the bottom of the right atrium

• Bundle of His

• Positioned at the top left of the right atrium

• Purkinje fibres

• Surround the ventricles on the outside

Identify the major blood vessels in the heart diagram.

• Inferior Vena Cava

• 9

• Aorta

• 15

• Superior Vena Cava

• 8

• Pulmonary Vein

• 2

• Pulmonary Artery

• 1

Identify label 3

• Right ventricle

• Right atrium
• left atrium
• Left ventricle

Which node in the heart has a 120ms delay in order to allow the right atrium to completely empty?

• Sinoatrial node

• Arterialventricular node

• Atrioventricular node

• Sinoarterial node

Which node in the heart is the heart's natural pacemaker- which regulates the beat of the heart?

• Bundle of His

• Sinoatrial node

• Purkinje fibres

• atrioventricular node

What does the word hypertension mean?

• High blood pressure

• Low blood pressure

• high stress levels

• Low stress levels

Which of these is NOT a factor which causes CHD

• A healthy diet

• Stress

• Lack of exercise

• Genetics