Finally I will determine which of these three times intervals account for the exercise induced changes in the R-R interval. During the normal cardiac cycle, there is a sequential contraction of the atria and the ventricles, followed by a period of relaxation as the heart fills with blood. Since these sequential contraction are initiated by an action potential, the action potential must first take place in all atria fibers, and then in all ventricular fibers. This synchronous electrical activity in so many cardiac muscle cells produces currents that can be monitored with electrodes placed on the skin; the resulting recording is called electrocardiogram, or ECG. The human ECG consists of five waves, which are expressed as the P-Wave, the QRS complex, and the T-Wave.
Explain. It uses 3D and 2D images to view the heart as well as an Electrocardiogram to view the activity rhythm/cycle of the heart. Results Table 2: Resting and Exercising Cardiac Cycle Length, EDV, and ESV Subject 1 Subject 2 Subject 3 Averages Cardiac cycle length (msec)
Cardiac case study Case Study #2 Professor: Methavichit Sandra Martin 10/01/2013 Case Study Questions: Myocardial Infarction 1. What is the significance of an elevated ST segment inversion on an EKG and the PVCs the nurse sees on the monitor? It is Hypoxic Injury. Rapid discharges that record on the monitor as back-to-back PVCs tells us that his heart is getting ischemia. Usually requires more aggressive treatment such as reperfusion therapy.
Nurse Ratched has been asked by Dr. Feelgood to educate 63 year old patient Mr. Hart about his recent diagnosis of hypertension. Nurse Ratched begins by explaining that blood pressure is measured in two phases, called the systolic and diastolic pressure. The measure of pressure exerted on the arterial walls as blood is pushed through by the heart as it pumps is the higher number measured, called the systolic pressure. The measure of pressure exerted between pumps when the heart is resting is called the diastolic pressure and this provides the lower number. Nurse Ratched further explains that in a normal, healthy system, blood pressure will rise and fall within an acceptable range in response to various activities and stimuli.
Lastly the blood is then given back to hearts left side. And on the right side, the left atrium gets blood and gives it back to ventricle, this also happens when the heart relaxes. The blood then is pushed through aorta and given to rest of the
Assignment 1 Christian A. Fortaleza Exercise Physiology Professor J. Johnson 22 April 12 Introduction Physical activity or exercise is the most important aspect of healthy living. It reduces the risk of heart disease, stroke, certain cancers, and high blood pressure. Further, physical activity helps maintain body weight, tone the muscles, strengthens the joints and bones, and increases self-esteem. When undergoing physical activity one must consider the effects of various intensities of work to the heart. The heart is a complex organ in which every beat of supplies the body with the life giving oxygenated blood.
Could Exercise Really Play a Role in Your Health? Blood Pressure Could Exercise Really Play a Role in Your Health? Blood Pressure Introduction Blood pressure (BP) is defined “as the pressure the blood exerts against any unit area of the blood vessel walls, and it is generally measured in the arteries. Because the heart alternately contracts and relaxes, the resulting rhythmic flow of blood into the arteries causes the blood pressure to rise and fall during each beat. Thus you must take two blood pressure readings: the systolic pressure, which is the pressure in the arteries at the peak of ventricular ejection, and the diastolic pressure, which reflects the pressure during ventricular relaxation.
•If chest pain is present, have client lie down, monitor cardiac rhythm, give oxygen, run a strip, medicate for pain, and notify the physician. These actions can increase oxygen delivery to the coronary arteries and improve client prognosis. •Place on cardiac monitor; monitor for dysrhythmias, especially atrial fibrillation. Atrial fibrillation is common in heart failure. •Watch laboratory data closely, especially arterial blood gases and electrolytes, including potassium.
Shortness of breath Congestive heart failure is diagnosed by physical signs and tests. With a medical history it would show if you have risk factors for CHF.Enlarge heart, swelling of the feet, abnormal heart sounds tenderness or swelling of the liver are the physical signs that is look for in heart failure.EKG, blood test chest x-ray, angiography is some of the tests you can get done to test for CHF. CHF can be treated in many different ways
It is recorded as a baseline to identify the patient’s usual range. (Bickley and Szilagyi 2009) and vital to identify the degree of care a patient will require and preventing a patient from deteriorating. (Wheatley 2006). The heart maintains circulation by a series of events known as cardiac cycle. The contraction and relaxation of the heart muscle during the cardiac cycle allows blood to flow around the body.