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Heart Attack and Cardiac Disorders

(6) Heart Attack and Cardiac Disorders

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How blood pumps through the heart

Blood

What is the pumping action of a normal heart?

A normal heart with a rate of 70 beats per minute pumps a little more than 2.5 fluid ounces of blood per stroke; that adds up to 6 quarts of blood output per minute.

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(7) Heart Attack and Cardiac Disorders

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Heart Disease and Heart Attacks

heart

What is the nerve control of the heart?

Two separate nervous systems link your heart and your brain. The sympathetic (accelerator) system releases noradrenalin and speeds up your heart rate, whereas the vagus (inhibitory) system tends to slow your heart rate. The major effect of the vagus system is to depress the frequency of heart impulses fired by the sinus node.

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(9) Heart Attack and Cardiac Disorders

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Angina Pectoris

coronary2

What is angina pectoris or angina?

Angina or angina pectoris often is the first symptom of coronary artery disease (CAD) and, in some cases, of a heart attack.

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(8) Heart Attack and Cardiac Disorders

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Normal Blood Pressure

diastolic blood pressure2

What is normal blood pressure?

A healthy heart maintains normal blood pressure (BP), a lot like maintaining proper water pressure in your household plumbing system or air pressure in your automobile tires.

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(10) Heart Attack and Cardiac Disorders

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Stable Angina

ANG

How do stable angina and unstable angina differ?

Stable angina is a predictable chest pain that can be severe. Rest usually relieves such pain, and nitroglycerin (a small white tablet placed under the tongue) usually is effective in ending angina pain.

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