Heart excitation

Physiology of the Heart Dr. George Pearce

Functions of the Heart ,[object Object],[object Object],[object Object],[object Object],[object Object]

The cardiovascular system is divided into two circuits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Heart chambers and valves

Cardiac Muscle Contraction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Conduction System of the Heart ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Heart Physiology: Sequence of Excitation ,[object Object],[object Object],[object Object]

Impulse Conduction through the Heart

Electrocardiogram ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ECGs, Abnormal Arrhythmia: conduction failure at AV node No pumping action occurs

A Simple Model of Stroke Volume Figure 20.19a-d

Factors Affecting Cardiac Output Figure 20.20

Heart Rate ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Regulation of Heart Rate ,[object Object],[object Object],[object Object]

Regulation of the Heart ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Preload and Afterload Figure 18.21

Effects of Hormones on Contractility ,[object Object],[object Object],[object Object]

Exercise and Cardiac Output ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Factors Involved in Regulation of Cardiac Output

Heart excitation

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