The membrane that forms the lining inside the heart is the: endocardium. The term for an electrical device that can keep the heart rhythm within a desirable range is: cardiac pacemaker.
What is the name of the record produced by recording the electrical currents of the heart muscle?
The electrocardiogram can measure the rate and rhythm of the heartbeat, as well as provide indirect evidence of blood flow to the heart muscle. A standardized system has been developed for the electrode placement for a routine ECG. Ten electrodes are needed to produce 12 electrical views of the heart.
Which of the following medical terms refers to the sac that encloses the heart?
pericardium. Also known as the pericardial sac, is the double-walled membranous sac that encloses the heart.
What does endocardial mean quizlet?
Situated or occurring inside the heart. c. Inflammation of the endocardium. d.What are arterioles?
An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have muscular walls (usually only one to two layers of smooth muscle cells) and are the primary site of vascular resistance.
Which of the instrument is used for recording the electrical activity of the heart?
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG). It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin.
What is the term for a ballooning out of the wall of a vessel usually an artery caused by congenital defect or weakness of the vessel wall?
An aneurysm is an abnormal widening or ballooning of a part of an artery due to weakness in the wall of the blood vessel.
What is endocardium function?
Anatomic function: A tissue covering the inside of the heart, the endocardium keeps the blood flowing through the heart separate from the myocardium, or cardiac muscles. It also lines the valves, which open and close to regulate blood flow through the chambers of the heart.Is a record of the electrical activity of the myocardium?
An ECG measures and records the electrical activity that passes through the heart.
What does Microcardia mean in medical terms?[ mī′krō-kär′dē-ə ] n. Abnormal smallness of the heart.
Article first time published onWhat is the definition of the medical term epicardium?
Definition of epicardium : the inner layer of the pericardium that closely envelops the heart.
What is the name of the sac that surrounds the heart quizlet?
The pericardium is a tough, fibrous double-walled sac that surrounds and protects the heart. It has two layers that contain a few milliliters of serous pericardial fluid.
What is it called when a vessel expands?
When vessels expand it is called. Vasodilation. When vessels contract. Vasoconstriction. Epicardium.
Where is pericardium attached?
portion of the sac, or fibrous pericardium, is firmly attached to the diaphragm below, the mediastinal pleura on the side, and the sternum in front. It gradually blends with the coverings of the superior vena cava and the pulmonary (lung) arteries and veins leading to and from the heart.
What is a vein?
What Are Veins? Your blood loses oxygen as it travels through your arteries. Veins carry the blood back to your heart to absorb more oxygen. Your veins usually hold about 75% of all the blood flowing through your body. Your largest veins are the superior and inferior vena cava.
What are the arterioles and venules?
description. … their very small branches are arterioles. Very small branches that collect the blood from the various organs and parts are called venules, and they unite to form veins, which return the blood to the heart.
What is the difference between arterioles and venules?
Arterioles connect with even smaller blood vessels called capillaries. … Veins and venules have much thinner, less muscular walls than arteries and arterioles, largely because the pressure in veins and venules is much lower. Veins may dilate to accommodate increased blood volume.
What term is used for a blockage of a vessel by foreign material?
An embolism is a blocked artery caused by a foreign body, such as a blood clot or an air bubble.
What is a benign tumor made up of newly formed blood vessels?
A hemangioma is a benign (noncancerous) tumor made up of blood vessels. There are many types of hemangiomas, and they can occur throughout the body, including in skin, muscle, bone, and internal organs. Most hemangiomas occur on the surface of the skin or just beneath it.
Which of the following is not a part of all circulatory systems?
The correct answer is Villi. Capillaries are called very tiny blood vessels. The Capillaries expand like a mesh in the whole body. Through these capillaries, blood is transported to all parts of the whole body.
Which of the following instrument is used for recording the electrical activity of the muscles?
Electromyograph is an instrument used for recording the electrical activity of the muscles to determine whether the muscle is contracting or not; or for displaying on the CRO. 5.
Which instrument can record electrical changes during heartbeat Class 10?
Electricardiography (ECG or EKG) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on the skin.
What process is used for recording electrical activity in the brain?
electroencephalography, technique for recording and interpreting the electrical activity of the brain. … The recording produced by such an instrument is called an electroencephalogram, commonly abbreviated EEG.
Which term means a record of the electrical activity of the myocardium quizlet?
Which term means a record of the electrical activity of the myocardium? electrocardiogram.
What is plasma with the clotting proteins removed?
Plasma with the clotting proteins removed is known as. serum. Having an abnormally small number of platelets in the circulating blood is known as. thrombocytopenia.
Can I drink coffee before an EKG?
Patients can expect No food or drink items containing caffeine (coffee, tea, chocolate, cola) for at least 12 hours before the test. The patient may be advised to stop taking certain medications before the test.
What is the myocardium made of?
The myocardium is the muscular layer of the heart. It consists of cardiac muscle cells (cardiac myocytes [also known as cardiac rhabdomyocytes] or cardiomyocytes) arranged in overlapping spiral patterns.
What is the myocardium of the heart?
The myocardium is the muscular wall of the heart, or the heart muscle. It contracts to pump blood out of the heart and then relaxes as the heart refills with returning blood. The myocardium’s smooth outer membrane is called the epicardium. Its inner lining is called the endocardium.
What is endocardium tissue?
The endocardium is the innermost layer of the heart and lines the chambers and extends over projecting structures such as the valves, chordae tendineae, and papillary muscles.
How did myocardial infarction get its name?
The main change is necrosis (death) of myocardial tissue. The word “infarction” comes from the Latin “infarcire” meaning “to plug up or cram.” It refers to the clogging of the artery.
What does angiogram mean in medical terms?
Listen to pronunciation. (AN-jee-oh-gram) An x-ray or computer image (CT scan or MRI) of the blood vessels and blood flow in the body. A dye may be injected through a catheter (small tube) into an artery or vein to make the blood vessels easier to see.
