WHAT IS THE DIFFERENCE BETWEEN SYSTOLE AND DIASTOLE?

Comparison chart

  Diastolic Systolic
Definition: It is the pressure that is exerted on the walls of the various arteries around the body in between heart beats when the heart is relaxed. It measures the amount of pressure that blood exerts on arteries and vessels while the heart is beating.
Normal range: 60 – 80 mmHg (adults); 65 mmHg (infants); 65 mmHg (6 to 9 years) 90 – 120 mmHg (adults); 95 mmHg (infants); 100 mmHg (6 to 9 years)
Importance with age: Diastolic readings are particularly important in the monitoring blood pressure in younger individuals. As a person's age increases, so too does the importance of their systolic blood pressure measurement.
Blood Pressure: Diastolic represents the minimum pressure in the arteries. Systolic represents the maximum pressure exerted on the arteries.
Blood Pressure reading: The lower number is diastolic pressure. The higher number is the systolic pressure.
Ventricles of the heart: Fill with blood Left ventricles contract

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Systole

Diastole

Rhythmic contraction of the chambers of the heart

Rhythmic relaxation of the chambers of the heart

It helps in emptying of blood from heart

Leads to refilling of heart with blood.

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Systole is the squeezing of the heart to push blood out. It increases pressure in the arterial system .

Diastole is when the heart relaxes and refills. The pressure decreases during this time, because the heart isn 't pushing any blood into the system.


When we use an arterial line to measure blood pressure, we see it as a continuous tracing. That picture shows you how blood pressure goes up and down with each heartbeat. Cuff pressures just give a snapshot view of the peak and trough of the wave.

You can feel the result of the heart pushing blood into the arterial system when you take your own pulse.
 
Diastole is the relaxation of the cardiac muscles after having contracted and pumped out the blood into the arteries.


Systole is the contraction of the ventricles of the heart which pushes the blood out of the heart.

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Systole

Diastole

Rhythmic contraction of the chambers of the heart

Rhythmic relaxation of the chambers of the heart

It helps in emptying of blood from heart

Leads to refilling of heart with blood.

Comparison chart

  Diastolic Systolic
Definition: It is the pressure that is exerted on the walls of the various arteries around the body in between heart beats when the heart is relaxed. It measures the amount of pressure that blood exerts on arteries and vessels while the heart is beating.
Normal range: 60 – 80 mmHg (adults); 65 mmHg (infants); 65 mmHg (6 to 9 years) 90 – 120 mmHg (adults); 95 mmHg (infants); 100 mmHg (6 to 9 years)
Importance with age: Diastolic readings are particularly important in the monitoring blood pressure in younger individuals. As a person 's age increases, so too does the importance of their systolic blood pressure measurement.
Blood Pressure: Diastolic represents the minimum pressure in the arteries. Systolic represents the maximum pressure exerted on the arteries.
Blood Pressure reading: The lower number is diastolic pressure. The higher number is the systolic pressure.
Ventricles of the heart: Fill with blood Left ventricles contract
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Systole is the squeezing of the heart to push blood out. It increases pressure in the arterial system.

Diastole is when the heart relaxes and refills. The pressure decreases during this time, because the heart isn't pushing any blood into the system.

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