Histopharmacology of cardiac muscle

 

Many drugs act on the myocardium and cause it to beat faster or stronger, or the contrary. Adenergic drugs are used to cause increase in rate and strength of contraction. They act either selectively or in combination on α and β receptors. The drugs include catecholamines of which the most important are epinephrine, norepinephrine, isoprenaline, dopamine, dobutamine and dopexamine.

Atropine,  a popular anticholinergic drug can also increase heart rate by blocking cholinergic effect of bradycardia. Vasovagal attack also called primary shock occurs when there is an overwhelming cholinergic action on the heart causing sudden hypotension and bradycardia.

 

 

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Electronic School of Medicine
Creator: Oluwole Ogunranti

          


Cardiac muscle explanatory video

 

 

 

Introduction

Histology

   Smooth muscle

   Striated muscle

   Cardiac muscle

Embryology
Gross anatomy
Organ integration
Clinical anatomy

Quiz

Physiology

Smooth muscle      

Striated muscle      

Cardiac muscle      

Biochemistry

Pharmacology
Smooth muscle      

Striated muscle    

Cardiac muscle      

Chemical Pathology

Anatomical Pathology

Imaging

Medicine

Surgery

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