Describe the Cardiac Cycle The Cardiac cycle is a description of the activities that take place in the period from the start of one heart the next. The conducting system autonomically controls the heart beat impulses it is also called the cardiac conduction system or the nodal system. It is made up of six main components the sinoatrial node (SA-Node)‚ internodal paths‚ atrioventricular node (AV-Node)‚ atrioventricular bundle (AV bundle) or bundle of His‚ bundle branches and Purkinje fibres. Contractile
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electrical conduction disturbances? A. Atrial fibrillation B. Ventricular fibrillation C. Ectopic foci D. Premature ventricular contraction 3. A common adverse effect from quinidine overdosage is A. Hypertension B. Tachypnea C. Cinchonism D. Dry mouth 4. Disopyramide produces a _____ in conduction and _____ of the refractory period. A. Increase‚ contraction B. Increase‚ prolongation C. Decrease‚ contraction D. Decrease‚ prolongation 5. In atrial flutter‚ one would expect the ECG
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and their cusps flatten against the arterial walls as the blood rushes past them. When the ventricles relax‚ the blood flows backward toward the heart‚ it fills the cusps & CLOSES the valves. THE AV VALVES. ~ 2 AV valves are located at each atrial-ventricular junction‚ prevent backflow into the atria when the ventricles are contracting. : 1) Tricuspid Valve-the right AV valve has 3 flexible cusps. 2) The Mitral Valve-the left AV valve with 2 flaps. It is sometimes called the bicuspid valve
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ch15 Student: ___________________________________________________________________________ 1. The heart pumps about ____ liters of blood a day and contracts about _____ times in a lifetime. A. 1‚000 liters; 1 billion B. 1‚200 liters; 2 billion C. 3‚000 liters; 2 billion D. 7‚000 liters; 2.5 billion 2. Circulation is vital because it A. supplies oxygen and nutrients to and removes wastes from tissues. B. inflates the lungs. C. delivers carbon dioxide to tissues and removes excess
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Tesla comes into the cardiology office‚ complaining of fatigue‚ palpitations‚ shortness of breath with mild activity‚ ongoing consistently for the past week without any chest pain or syncopal episodes. She is a 75-year-old woman with a history of atrial fibrillation (AFib)‚ controlled type 2 diabetes‚ myocardial infarction (MI) with a history of percutaneous coronary intervention (PCI) to right coronary artery‚ stage IV chronic renal failure‚ and a mild mitral regurgitation on ECHO 7 years ago. Her
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or stress. The parasympathetic nervous system slows down the heart rate during periods of rest. The Sino-atrial node sends electrical impulses around the heart muscle and tells it how fast it should be beating according to the impulses received from the parasympathetic and sympathetic nervous systems. Every few seconds‚ the Sino-atrial node sends out nerve impulses which branch across the atrial muscle fibres and cause a contraction. These impulses are received by the atrio-ventricular node which stimulates
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Circulatory Systems • • • • Transport Diffusion Circulatory system As organisms increase in complexity diffusion becomes inefficient – Gases – Components of immune systems – Sugars‚ salts‚ – Removal of metabolic waste 1 Characteristics of a blood vascular system • A blood circulatory system consists of the following: • Two types – Open → Arthropods – Closed → Vertebrates • Pump • Vessels • Circulatory fluid 2 Circulatory system - Open • Insects and some
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The cerebellum is responsible for conscious and unconscious muscle synergy and for maintaining balance and posture. Where is the primary defect in Parkinsons disease and Huntingtons? (pg. 453) The basal ganglia system is believed to have a fine-tuning effect on motor movements. Parkinson’s disease and Huntington’s disease are associated with defects of the basal ganglia. What is the function of the CSF? (pg 461) CSF is a clear‚ colorless fluid similar to blood plasma and interstitial
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Health Teaching A Paper Presented to Rima Nepangue RN‚ MSN‚ College of Nursing Adventist University of the Philippines In Partial Fulfillment Of the Requirements for the Course Advance Health Assessment By Aris Calangi HEALTH TEACHING This is the profession of educating people about health. Areas within this profession encompass environmental health‚ physical health‚ social health‚ emotional health‚ intellectual health‚ and spiritual health. It can be defined as the principle
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Cardiovascular Anatomy & Physiology I. Structures and Functions Heart Muscle * Has 3 layers (epicardium‚ myocardium‚ and endocardium) and a surrounding sac called the pericardium * Location: In the mediastinum‚ above the diaphragm‚ and is surrounded on both sides by lung * Shape: Resembling triangle‚ with base parallel to the right edge of the sternum Heart Chambers * The right side of the heart is a low pressure system and the left side is a high pressure system
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