Cardiovascular Anatomy and Electrical Activity: Heart Chambers, Nodes, and ECG Phases

Where will you find oxygenated blood?

1 Left ventricle

Deoxygenated blood flows directly through the ___ to the ___?

Pulmonary arteries, lungs

Deoxygenated blood flows through the ___ to the ___?

Superior vena cava, right atrium

Where is the AV node located?

B

Where is the SA node located?

A

Is blood from lungs through pulmonary veins oxygenated?

Yes, the blood is carrying O2

What happens during the QRS complex?

Ventricular depolarization,

isovolumetric contraction of ventricle,

atrial repolarization & Atrial diastole

What happens during the ST segment?

Ventricular depolarization complete,

ventricular systole and ejection (plateau phase)

What happens during the T wave?

Ventricular repolarization,

early diastole,

isovolumetric relaxation of ventricles

What is structure #1 (strings in ventricle)?

Chordae tendineae

What are numbers 1, 2, 3 ?

1= Papillary Muscles 2= Interventricular Septum 3= Brachiocephalic Vein

Which chamber has oxygenated blood?

Left side of heart

Which ventricle has the thickest wall?

Left ventricle

What type of blood do pulmonary veins carry?

Oxygenated

What type of blood do pulmonary arteries carry?

Deoxygenated

What is the function of the SA node?

Pacemaker, initiates heartbeat

What is the function of the AV node?

Delays signal, sends to ventricles

What does the P wave represent?

Atrial depolarization

What does the QRS complex represent?

Ventricular depolarization

What does the ST segment represent?

Ventricular contraction (systole)

What does the T wave represent?

Ventricular repolarization