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Effect of Epinephrine on the heart

Stimulate heart contraction, Increased heart rate, Increased force of contraction; Stimulated Sympathetic control

Effect of ACH (acetylcholine) on the heart

Slows down heart & contraction; Simulated Parasympathetic control

Effect of Atropine on the heart

Binds, Reverse effect of ACH, Increased heart rate & force of contraction.

Effect of NaCl (sodium) on the heart

Increases depolarization, Increases heart rate, Decreases contraction force

Effect of KCI (potassium) on the heart

Decreased heart rate, Decreased contraction force, Can Stop

Effect of CaCl (calcium chloride) on the heart

Increased depolarization, Increases heart rate, Strong contraction force

Interpret Heart Rate

Heart Rate= BPM 60 / M Marker (s) seconds

Contractile Force A-B

Atrial Contraction

Contractile Force B-C

Atrial Relaxation

Contractile Force C-D

Ventricular Contraction

Contractile Force D-E

Ventricular Relaxation

Ringer Solution

Contained water & electrolytes

Heart Cardiac Muscle

Can initiate a contraction without stimulation by autonomic nervous system

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