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when we talk about cardiac muscles we s
when we talk about cardiac muscles we s

... -The left atrium may enlarge in the case of mitral (bicuspid) valve stenosis. In this case the blood will accumulate in the left atrium and it may reach the lung through the pulmonary veins. - Mitral (bicuspid) valve stenosis may be caused by rheumatic heart disease. -We can assume the size if the ...
Heart Big idea and assignment info
Heart Big idea and assignment info

... What are the health risks associated with watching TV? 2) What is the average amount of time Americans spend watching TV? 3) What indicators or data can be used to determine which group of people is most likely to have a higher risk of premature death? 4) Think about your lifestyle. What is your lev ...
Early Heart Attack Care - Southern Ohio Medical Center
Early Heart Attack Care - Southern Ohio Medical Center

... What to ask and look for • Do you have any chest discomfort? • Is it tightness, pressure, pain in the center of your chest? • Is the discomfort also in your arms or jaw or neck or throat or back? • Are you sick to your stomach? • Is the person sweaty or clammy? • What were you doing when the sympto ...
Diastolic Heart Failure
Diastolic Heart Failure

... 3) Biventricluar failure is conventionally known as CCF. Many clinicians dislike the term CCF as there is pulmonary CONGESTION with pure LVF; nevertheless, it is so commonly used that this term is likely to persist. 4) Isolated right heart failure is rare Most patients with left ventricular failure ...
The effect of intrathoracic heart position on
The effect of intrathoracic heart position on

... doi:10.1016/j.jelectrocard.2004.10.006 ...
Acute Coronary Syndromes - American Association of Critical
Acute Coronary Syndromes - American Association of Critical

... Myoglobin is a heme protein located on cardiac and skeletal striated muscle. Due to its low molecular wt. it is released very rapidly from the muscle after an ischemic event (faster than troponin or CK-MB). Serum levels will rise within 2 hrs of chest pain, peak in 3-15hrs and return to normal level ...
Overview of Coronary Artery Disease
Overview of Coronary Artery Disease

... Health and Nutrition Examination Survey (NHANES) data, MI prevalence was compared by sex in middle-aged individuals (35 to 54 years) during the 1998 to 1994 and 1999 to 2004 time periods [3]. Although MI prevalence was significantly greater in men than women in both time periods (2.5 versus 0.7 and ...
treating atrial fibrillation
treating atrial fibrillation

... fluid accumulates in the body. ...
Unusual Circumstances Stump a Timely MI Diagnosis
Unusual Circumstances Stump a Timely MI Diagnosis

... A 53-year old male presented to a family medicine office with right arm pain. He was born with an atrophic left arm, and had pulled himself up into a pickup truck three days earlier with his normal right arm. He was evaluated by a Family Nurse Practitioner (FNP) who diagnosed a right trapezius muscl ...
Higher Human Biology - Mrs Smith' s Biology
Higher Human Biology - Mrs Smith' s Biology

... • The P – R interval time between the events of atrial systole and ventricular systole. This period represents the time taken for the impulse to spread from the SA node through the atria, plus the delay in transmission to the AV node, together with the conduction time through the bundle of His and P ...
Heart dissection with context APS
Heart dissection with context APS

... another quantitative analysis by asking students to estimate the resistance to flow in each of those vessels using Poiselle’s law. What will happen to resistance in the coronary artery if its diameter is reduced by half because of plaque?) Potential follow-up questions & discussions. The possible po ...
Medical Director - Clinical Measurement Referral
Medical Director - Clinical Measurement Referral

... of a neurally-mediated cardio-inhibitory reflex in laboratory conditions. It is not indicated if the history is typical of reflex syncope. A positive tilt test is only relevant if the response on the tilt table correlates with the clinical picture. Tilt testing may be indicated (after history, exami ...
Circulatory System
Circulatory System

... The heart pumps blood through a series of blood vessels throughout the body. The blood contains oxygen that it picks up from the lungs and nutrients absorbed from the digestive system. It carries the blood out to the tissues throughout the body to be used for energy. Once the oxygen is distributed a ...
Postural Tachycardia Syndrome
Postural Tachycardia Syndrome

... intolerance. Postural tachycardia syndrome (POTS) is one type of orthostatic intolerance. In some people, orthostatic intolerance occurs because of a failure in only 1 of the 3 compensatory actions mentioned previously. In these cases, the other 2 compensatory actions will increase markedly as a way ...
Read article - Heart Rhythm Alliance
Read article - Heart Rhythm Alliance

... intolerance. Postural tachycardia syndrome (POTS) is one type of orthostatic intolerance. In some people, orthostatic intolerance occurs because of a failure in only 1 of the 3 compensatory actions mentioned previously. In these cases, the other 2 compensatory actions will increase markedly as a way ...
Blood Vessels
Blood Vessels

... Atrioventricular (AV) node In floor of atrium near coronary sinus After a short delay (millisecond) an impulse is conducted along interventricular septum via Bundle of His ...
Chapter 18 PowerPoint B
Chapter 18 PowerPoint B

... (c) Second-degree heart block. (d) Ventricular fibrillation. These chaotic, grossly irregular ECG Some P waves are not conducted deflections are seen in acute through the AV node; hence more heart attack and electrical shock. P than QRS waves are seen. In this tracing, the ratio of P waves to QRS wa ...
Patient Info SVT
Patient Info SVT

... in the form of heat. This allows us to burn areas in the heart that precipitate the abnormal heart rhythms. These burns create scars. Electricity can not travel through a scar. Therefore, this leaves the “ablated” tissue unable to induce or sustain the arrhythmia. For the treatment of AVNRT, cathete ...
The Mitral L-Wave - Heart Clinic of Louisiana
The Mitral L-Wave - Heart Clinic of Louisiana

... volumes are not excessive.4 This becomes evident by detection of LA to LV flow during diastasis, hence the L-wave. In the dog model, a pathologic L-wave is associated with a greater “oscillatory frequency” of LA–LV pressure profiles than an L-wave found in relatively bradycardic normal individuals. ...
Bermingham, M
Bermingham, M

... OBJECTIVE: To evaluate the effect of an 8-week, water-based exercise program (experimental group) with that of an upper-extremity function program (control group) to increase cardiovascular fitness within a community setting for people with stroke. DESIGN: Single-blind randomized controlled trial. S ...
ppt
ppt

... Conduction Speed  SA node: slow speed of conduction  Ventricular and Atrial muscle: Moderate speed  AV node: slowest speed of conduction  Purkinje fibers: Fastest speed of conduction  Ectopic Pacemaker- Abnormal site of pacemaker ...
Presentatie B.G.F. Springorum, Elektrofysiologie inleiding
Presentatie B.G.F. Springorum, Elektrofysiologie inleiding

... The fossa ovalis is a thin layer of tissue that forms shortly after birth that can provide access to the left atrium using special instruments. ...
A1991FQ72000001
A1991FQ72000001

... There are at least three primary reasons for this paper’s status. First, the concept that the heart has an endocrine fsrnction was astonishing, Second, the published experiments were as reproducible as they were dramatic. To be convinced of the diuretic effect, one had only to watch the urine output ...
Tissues in the lungs
Tissues in the lungs

the heart failure symposium - Heart and Stroke Foundation of New
the heart failure symposium - Heart and Stroke Foundation of New

... studies and current treatment options. We have brought together leading experts in the field who will impart their knowledge through presentations and a panel discussion over the course of a half day symposium. As of today, nearly 7600 New Brunswickers are affected by this disease. This number conti ...
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Electrocardiography



Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.
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