disorders of the circulatory system

• blood pressure can be measured using

  sphygmomanometer
• normal blood pressure is

  120/80 mmHg
• value of high blood pressure (hypertension)

  140/90 mmHg or more
• hypertension may lead to

  heart disease and affects brain and kidney
• value low blood pressure (hypotension)

  110/70 mmHg or less
• coronary artery disease is also known as

  atherosclerosis
• atherosclerosis is caused by

  deposits of calcium, cholesterol, fat and fibrous tissues in the lumen of coronary arteries
• arteriosclerosis is a condition where

  elasticity of arteries decreases
• acute chest pain appearing when not enough oxygen is reaching the heart muscle due to defective blood flow is a symptom of


  angina pectoris
• thrombosis is

  formation of blood clots inside blood vessels
• bradychardia

  decrease in heartbeat
• tachycardia

  increase in heartbeat
• heart failure occurs when

  heart is not pumping blood effectively
• congestion of lungs is a symptom of

  heart failure
• cardiac arrest occurs when

  heart stops beating
• heart attack occurs due to

  sudden damage to heart muscle due to inadequate blood supply