Category Archives: Physiology

Congestive Heart Failure

Congestive heart failure (CHF) is a condition in which the heart’s function as a pump is inadequate to deliver oxygen rich blood to the body. Congestive heart failure can be caused by: diseases that weaken the heart muscle, diseases that … Continue reading

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Heart Conduction System

Heart’s electrical system controls all the events that occur when our heart pumps blood. The cardiac conduction system is also called the electrical system. The sinoatrial node (SAN), located within the wall of the right atrium (RA), normally generates electrical … Continue reading

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Types of Sleep

Sleep was long considered just a uniform block of time when you are not awake. Thanks to sleep studies done over the past several decades, it is now known that sleep has distinct stages that cycle throughout the night in … Continue reading

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What is Normal Heartbeat?

The normal resting adult heart beats regularly at an average rate of 60-100 times per minute. How fast the heart beats (heart rate) is governed by the speed of electrical signals originating from the pacemaker of the heart, the SA … Continue reading

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What is Hyperbaric Oxygen Therapy (HBOT)?

Definition Hyperbaric oxygen therapy (HBOT) in a state-of-the-art monoplace chamber is a medical treatment during which the entire body is placed in a transparent, airtight chamber at increased atmospheric pressure. Physiology “Hyper” means increased and “baric” relates to pressure. Hyperbaric … Continue reading

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Oxygen Toxicity (Poisoning)

Definition Oxygen toxicity is the increased oxygen content in the tissues beyond certain level. It is also called oxygen poisoning. Cause It occurs because of breathing pure oxygen with high pressure of 2-3 atmospheres (hyperbaric oxygen). In this condition, an … Continue reading

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Sleep Disorder

Definition Sleep disorders involve any difficulties related to sleeping, including difficulty falling or staying asleep, falling asleep at inappropriate times, excessive total sleep time, or abnormal behaviors associated with sleep. Causes, incidence, and risk factors Many different disorders of sleeping … Continue reading

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