International Up-to-date Clinical Channel, IUCC

2022-03-25 21:38:37 A 'U' wave as seen on ECG

The 'U' wave is a wave on an electrocardiogram (ECG). It comes after the T wave of ventricular repolarization and may not always be observed as a result of its small size. 'U' waves are thought to represent repolarization of the Purkinje fibers. However, the exact source of the U wave remains unclear. The most common theories for the origin are:
• Delayed repolarization of Purkinje fibers
• Prolonged re-polarisation of mid-myocardial M-cells
• After-potentials resulting from mechanical forces in the ventricular wall
• The repolarization of the papillary muscle.

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2022-03-20 23:02:59 The circle of Willis is a circulatory anastomosis that supplies blood to the brain and surrounding structures.
The circle of Willis is a part of the cerebral circulation and is composed of the following arteries:
• Anterior cerebral artery (left and right)
• Anterior communicating artery
• Internal carotid artery (left and right)
• Posterior cerebral artery (left and right)
• Posterior communicating artery (left and right)

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2022-03-18 22:31:03 Level of spinal cord injury and extent of paralysis

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2022-03-11 16:31:01 The layers of the heart wall

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2022-03-08 05:40:08 Kyphosis vs. Scoliosis

Kyphosis causes the spine to curve abnormally on the sagittal plane, meaning it twists forward or backward, giving the back a rounded or hunched appearance. Scoliosis causes the spine to curve abnormally on the coronal plane, meaning it twists sideways.

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2022-03-05 20:00:34 Dermoid cyst of the ovary

A teratoma is a tumor made up of several different types of tissue, such as hair, muscle, teeth, or bone.
A dermoid cyst is a mature cystic teratoma containing hair (sometimes very abundant) and other structures characteristic of normal skin and other tissues derived from the ectoderm. The term is most often applied to teratoma on the skull sutures and in the ovaries.

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2022-02-28 22:25:30 The electrical conduction system of the heart transmits signals generated usually by the sinoatrial node to cause contraction of the heart muscle. The pacemaking signal generated in the sinoatrial node travels through the right atrium to the atrioventricular node, along the Bundle of His and through bundle branches to cause contraction of the heart muscle. This signal stimulates contraction first of the right and left atrium, and then the right and left ventricles. This process allows blood to be pumped throughout the body.

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2022-02-27 23:38:52 The circle of Willis is a circulatory anastomosis that supplies blood to the brain and surrounding structures.
The circle of Willis is a part of the cerebral circulation and is composed of the following arteries:
• Anterior cerebral artery (left and right)
• Anterior communicating artery
• Internal carotid artery (left and right)
• Posterior cerebral artery (left and right)
• Posterior communicating artery (left and right)

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2022-02-27 23:35:23 International Medical Channels and Groups:

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2022-02-24 15:57:04 Useful medical app
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