Arteriovenous malformation AVM and Embolization Treatment, Animation.
An arteriovenous malformation or an AVM is an abnormal formation of blood vessels connecting arteries and veins, BYPASSING the capillary system. The blood vessels of an AVM are commonly dilated and weakened due to high blood pressure and an AMV may bleed. Bleeding from an AVM may cause damage to surrounding brain tissue and result in a hemorrhagic stroke. An AVM can develop anywhere in the body but occurs most often in the brain or spine. AVMs are mostly congenital but not hereditary. They are believed to form during embryonic or fetal development. AVM embolization is an endovascular treatment.
Aimed to block blood flow in to an AVM and therefore reduce the risks of AVM bleeding. In this procedure, a catheter is inserted through the femoral artery at the groin and threaded all the way to the brain AVM. The catheter is used to inject a special glue into the AVM. The glue hardens when it comes into contact with the blood and seals off the AVM from the blood flow. AVM blood vessels do not supply normal brain tissue and therefore their blockage will not have any consequences on the patient.
Cardiac Conduction System and Understanding ECG, Animation.
The cardiac conduction system consists of the following components The sinoatrial node, or SA node, located in the right atrium near the entrance of the superior vena cava. This is the natural pacemaker of the heart. It initiates all heartbeat and determines heart rate. Electrical impulses from the SA node spread throughout both atria and stimulate them to contract. The atrioventricular node, or AV node, located on the other side of the right atrium, near the AV valve. The AV node serves as electrical gateway to the ventricles. It delays the passage of electrical impulses to the ventricles.
This delay is to ensure that the atria have ejected all the blood into the ventricles before the ventricles contract. The AV node receives signals from the SA node and passes them onto the atrioventricular bundle AV bundle or bundle of His. This bundle is then divided into right and left bundle branches which conduct the impulses toward the apex of the heart. The signals are then passed onto Purkinje fibers, turning upward and spreading throughout the ventricular myocardium. Electrical activities of the heart can be recorded in the form of electrocardiogram,.
ECG or EKG. An ECG is a composite recording of all the action potentials produced by the nodes and the cells of the myocardium. Each wave or segment of the ECG corresponds to a certain event of the cardiac electrical cycle. When the atria are full of blood, the SA node fires, electrical signals spread throughout the atria and cause them to depolarize. This is represented by the P wave on the ECG. Atrial contraction , or atrial systole starts about 100 ms after the P wave begins. The PQ segment represents the time the signals travel from the SA node to the AV node.
The QRS complex marks the firing of the AV node and represents ventricular depolarization Q wave corresponds to depolarization of the interventricular septum. R wave is produced by depolarization of the main mass of the ventricles. S wave represents the last phase of ventricular depolarization at the base of the heart. Atrial repolarization also occurs during this time but the signal is obscured by the large QRS complex. The ST segment reflects the plateau in the myocardial action potential. This is when the ventricles contract and pump blood.
SelfTest for Thyroid Problems
Hi I'm Dr. Allen Peters, Physician Healthy Aging Expert from NourishingWellness and I'm here today for About to share with you how to do a SelfTest for Thyroid Problems. This is a very simple exam which I do on every patient that I see, and you can do on yourself. You put your head back and feel for the thyroid cartilage. You feel both sides of the cartilage, and you might feel a small amount of soft tissue. You can exaggerate the tissue or exaggerate the thyroid cartilage by swallowing several times. If you feel more than a small amount.
Of tissueIf you feel a swelling or lumps or bumps this may be indicative on an enlarged thyroid or thyroid nodules which could be benign or malignant. If you do feel something large you should see your doctor. If he or she agrees the next step is usually getting an ultrasound. Now I want to mention that there are also some lumps behind the cartilage on the side of the neck, and these are just lymph nodes. I'm talking about the actual thyroid cartilage itself and the gland that is right there in.
That particular area. By the way, I want to emphasize that you could have an abnormal thyroid without being able to feel anything. It can be either hypothyroid or hyperthyroid. So if you are having symptoms of an increased metabolic rate like high blood pressure and palpitations and anxiety and nervousness to a great degree. Or if you are having slow down symptoms of slowdown metabolism like being tired and fatigued and depressed and low blood pressure and low pulse rate and constipated and hair falling out, then you may have thyroid disease even if you can't feel anything abnormal. So under those conditions.
Are Side Cramps Normal During Pregnancy
Are side cramps normal during pregnancy I don't know if I need to be worried about them or not. Side cramps may be reasonable if the uterus is expanding. The muscles are strained as they expand to make room for the baby. I worry about it being a sign of labor. Or a miscarriage. You should worry about it being a miscarriage if it becomes a horrific pain and you see blood. It is labor if the contractions are occurring regularly. That's the joke about staring at the clock, waiting for another contraction at a set interval.
And the cramps may be the muscles preparing for labor at some point. But the cramps are contractions if they are coming every ten or fifteen minutes. I've heard it could be a round ligament or curved or whatever. That ligament holds the uterus in place, and it creates a bursts of pain as the uterus grows. Exercise can strain it to the point of pain. I'm not exercising when this happens. In the case of the round ligament, just a jolt like coughing or standing up too quickly could set it off.
That's about the same list as things that get the baby active. The baby's activity might cause pain if he's kicking you in the lungs. That's not where the pain is. There's always the possibility you have digestive problems. Cramps might be a sign of food poisoning about to explode onto the scene. I've been throwing up, but that's morning sickness and breakfast, not dinner we ate out. It might be constipation. Your body is straining to get things out. I'd take castor oil to help, but that could cause labor.
What Does Our Blood Really Composed of
The blood as we all know, have many different functions in the body. Most of them includes transportation of different nutrients including Oxygen, glucose, and enzymes. It also functions for protection, temperature and pH balance. But have you ever wonder what really composes our blood Generally, we can divide the blood into two main groups. The first one is called the Plasma. It fills the 55 of the total blood volume. It is the liquid component of the blood and it has no cellular content. The other 45 is the blood's cellular component.
And and it is divided into three different kinds of cells. The greatest portion goes to the Red Blood Cells at 80, and the ramaining 20 is shared by the white blood cell and the platelets. The Red blood cells contains a protein called the HEMOGLOBIN which is responsible for its characteristic red color and the ability to carry oxygen atoms. It fills the bulk of 7585 RBC count. The White blood cells however, is much fewer compared to Red blood cells and only comprises at about 6 of the cellular component.
These cells are further divided to five different cells namely Neutrophils, being the most abundant of all which covers about 60 Lymphocytes being the second most numerous, the monocytes, eosinophils and lastly the basophils. And the last but not the least, the platelets which is the main responsible for the blood clotting process. The plasma moreover, also composed of different compounds. This are the Water, being the largest at about 90, the proteins which consist of the albumin, the clotting factors and immunoglobulins at around 8, the Hormones which includes amines and steroids,.
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