Tag Archives: Physiology

Congestive Heart Failure

Posted on July 2, 2011 by mdmedicine

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

Posted on April 24, 2011 by mdmedicine

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

Posted on April 24, 2011 by mdmedicine

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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Hypothalamus-Pituitary-Adrenal axis (HPA axis)

Posted on April 20, 2011 by mdmedicine
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What is Normal Heartbeat?

Posted on April 18, 2011 by mdmedicine

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)?

Posted on April 10, 2011 by mdmedicine

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)

Posted on April 9, 2011 by mdmedicine

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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Hemostasis

Posted on March 24, 2011 by mdmedicine

DEFINITION: Hemostasis is defined as arrest or stoppage of bleeding STAGES OF HEMOSTASIS: When a blood vessel is injured, the injury initiates a series of reactions resulting in hemostasis. It occurs in three stages: 1. Vasoconstriction 2. Platelet plug formation … Continue reading →

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