Systole

 

This is the name given to the contraction of the heart. It is sometimes separated into an atrial systole and a ventricular systole since contraction of the atrial comes shortly before that of the ventricles. It is followed by relaxation of the heart called diastole. Just before systole the atrioventricular valves (mitral, tricuspid) close, allowing rapid increase in ventricular pressures. Just before diastole, the valves open allowing  blood to pass into the ventricles thereby causing a rapid reduction in ventricular pressures but a sustained rise in ventricular volume because of the phenomenon called  rapid filling of the ventricles. The above are the events in the cardiac cycle.

       

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cell biology

Embryology

Histology

Gross anatomy

Lymphatic drainage

Organ integration
Clinical anatomy

Quiz

Dissector
Physiology

Biochemistry

Chemical Pathology

Anatomical Pathology

Pharmacology

Imaging

Medicine

Surgery

       

1 isovolumetric contraction 2 ejection 3 isovolumetric relaxation 4 rapid inflow 5 diastasis 6 atrial systole  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Main Subject Course Links

Anatomy Anesthesia Biochemistry Chemical pathology Community Health
Dermatology ENT Gynecology Hematology Imaging
Medicine Medical microbiology Obstetrics Ophthalmology Pathology
Pediatrics Pharmacology Physiology Psychiatry    Surgery/Orthopedics
eLab eOSCE eProcedures eInvestigations eSchool/Videopage
eOrgans eLocator Anatomy Museum eDissector eFractures
All diseases eClerking eTreatment eDoctor ePatient

 


 


Electronic School of Medicine
Creator: Oluwole Ogunranti