Electrocardiography
... foci. Escape arrhythmia refers to the ability of an ectopic focus to “escape” overdrive suppression and pace at its inherent rate, according to a physiologic hierarchy. The fastest available pacemaker paces and suppresses slower pacemaking activities, in what is known as overdrive suppression. - If ...
... foci. Escape arrhythmia refers to the ability of an ectopic focus to “escape” overdrive suppression and pace at its inherent rate, according to a physiologic hierarchy. The fastest available pacemaker paces and suppresses slower pacemaking activities, in what is known as overdrive suppression. - If ...
Cardiac Conducting System
... The pacemaker initiates electrical impulses that make cardiac muscle cells contract at a certain rate. ...
... The pacemaker initiates electrical impulses that make cardiac muscle cells contract at a certain rate. ...
"T*T
... 7. What changes from baseline were noted in the ECG recorded during running? None. The rate and strength of heart contractions is increased but the electrical current pattern height remains unchanged. ↑ rate; ↓ Q-T interval. ...
... 7. What changes from baseline were noted in the ECG recorded during running? None. The rate and strength of heart contractions is increased but the electrical current pattern height remains unchanged. ↑ rate; ↓ Q-T interval. ...
Heart Conduction System
... – *If the SA Node fails, the AV Node can take over • AV Node – stimulates contraction at a rate of 40-60 beats/minute – *If the AV Node fails, the Purkinje Fibers can take over • Purkinje fibers – stimulate contraction at a rate of 15-40 beats/minute ...
... – *If the SA Node fails, the AV Node can take over • AV Node – stimulates contraction at a rate of 40-60 beats/minute – *If the AV Node fails, the Purkinje Fibers can take over • Purkinje fibers – stimulate contraction at a rate of 15-40 beats/minute ...
Document
... • A number of other studies have also demonstrated that fluctuations in autonomic tone, as measured by HRV, precede the onset of AF • Acetylcholine shortens the atrial refractory period and increases the heterogeneity of atrial refractoriness, effects that predispose to reentry ...
... • A number of other studies have also demonstrated that fluctuations in autonomic tone, as measured by HRV, precede the onset of AF • Acetylcholine shortens the atrial refractory period and increases the heterogeneity of atrial refractoriness, effects that predispose to reentry ...
Tachycardia-Induced Cardiomyopathy
... (AV) node blocking agents (such as, metoprolol, digoxin and subsequently diltiazem), was poor due to perceived side-effects and persistent symptoms with inadequate heart rate control • A 24-hour Holter monitor reveals persistent atrial fibrillation and a rapid heart rate (averaging 130 beats per min ...
... (AV) node blocking agents (such as, metoprolol, digoxin and subsequently diltiazem), was poor due to perceived side-effects and persistent symptoms with inadequate heart rate control • A 24-hour Holter monitor reveals persistent atrial fibrillation and a rapid heart rate (averaging 130 beats per min ...
Atrial Fibrillation - Anticoagulation Europe
... Instead of beating normally, the upper chambers, the atria, start making repetitive twitching movements known as ‘fibrillations’. This hampers the movement of blood from the atria into the ventricles. The ventricles respond by beating faster and more irregularly. It is this irregular ventricular bea ...
... Instead of beating normally, the upper chambers, the atria, start making repetitive twitching movements known as ‘fibrillations’. This hampers the movement of blood from the atria into the ventricles. The ventricles respond by beating faster and more irregularly. It is this irregular ventricular bea ...
The Cardiovascular System
... • The atrial contraction ensures that all the blood is ejected into the ventricles. • As the ventricles continue going through diastole, the pressure increases, which causes the atrioventricular valves to close. • Ultimately the ventricular pressure overcomes that in the aorta and the pulmonary arte ...
... • The atrial contraction ensures that all the blood is ejected into the ventricles. • As the ventricles continue going through diastole, the pressure increases, which causes the atrioventricular valves to close. • Ultimately the ventricular pressure overcomes that in the aorta and the pulmonary arte ...
Step 2 Review Qns OBJECTIVES FOR THIS WEEK - med
... A 26-year-old woman presents to the ER complaining of a sudden onset of palpitations and severe shortness of breath and coughing. She reports that she has had several episodes of palpitations in the past, often lasting a day or two, but never with dyspnea like this. She has a history of rheumatic fe ...
... A 26-year-old woman presents to the ER complaining of a sudden onset of palpitations and severe shortness of breath and coughing. She reports that she has had several episodes of palpitations in the past, often lasting a day or two, but never with dyspnea like this. She has a history of rheumatic fe ...
Cardiovascular Diseases and ECG tracings
... Angina Atherosclerosis Heart attack Congenital heart disease Kawasaki disease Valve disorders And many more ...
... Angina Atherosclerosis Heart attack Congenital heart disease Kawasaki disease Valve disorders And many more ...
Supraventricular Tachycardia and Artial Fibrillation
... Persistent (requiring electrical or pharmacological treatment) Permanent ...
... Persistent (requiring electrical or pharmacological treatment) Permanent ...
Atrial Arrhythmias with Low Amplitude P waves
... of the previous findings of PAT with block and low amplitude P waves, an intra-atrial electrogram was repeated. This time there was atrial flutter (atrial rate 335 per minute), with a varying ventricular response (not shown). The digoxin level was 1.5 ng/ml. With further digitalis treatment the venh ...
... of the previous findings of PAT with block and low amplitude P waves, an intra-atrial electrogram was repeated. This time there was atrial flutter (atrial rate 335 per minute), with a varying ventricular response (not shown). The digoxin level was 1.5 ng/ml. With further digitalis treatment the venh ...
cardiac arrithmia
... • Ventricular flutter (VF) - a frequent (up to 200-300 per minute) and rhythmic excitement and their reduction. Fibrillation (flicker) ventricles (VF) - an equally frequent (up to 200-500 per minute), but random, irregular excitation and reduction of individual muscle fibers, leading to the cessati ...
... • Ventricular flutter (VF) - a frequent (up to 200-300 per minute) and rhythmic excitement and their reduction. Fibrillation (flicker) ventricles (VF) - an equally frequent (up to 200-500 per minute), but random, irregular excitation and reduction of individual muscle fibers, leading to the cessati ...
Atrial fibrillation - patient information
... Atrial fibrillation is a heart condition that causes an irregular and often abnormally fast heart rate. A normal heart rate should be regular and between 60 and 100 beats a minute when you’re resting. You can measure your heart rate by feeling the pulse in your neck or wrist. In atrial fibrillation, ...
... Atrial fibrillation is a heart condition that causes an irregular and often abnormally fast heart rate. A normal heart rate should be regular and between 60 and 100 beats a minute when you’re resting. You can measure your heart rate by feeling the pulse in your neck or wrist. In atrial fibrillation, ...
ATRIAL SEPTAL DEFECT
... through the opening in the septum, and then mix with oxygenpoor (blue) blood in the right atrium. ...
... through the opening in the septum, and then mix with oxygenpoor (blue) blood in the right atrium. ...
A Case of Left Atrial Sarcoma Presenting with Mitral Valve
... Case Report: 74 year-old woman with a distant history of coronary artery disease, myocardial infarction and percutaneous coronary intervention presented to the emergency department (ED) with several days of dry cough, malaise, shortness of breath, initially treated as community acquired pneumonia at ...
... Case Report: 74 year-old woman with a distant history of coronary artery disease, myocardial infarction and percutaneous coronary intervention presented to the emergency department (ED) with several days of dry cough, malaise, shortness of breath, initially treated as community acquired pneumonia at ...
heart and head – af and stroke.
... times higher than a person with no AF. Anticoagulants: Warfarin is superior in stroke prevention in AF. AF strokes tend to be more severe Warfarin reduces stroke risk by 64% Aspirin reduces stroke risk by 22% NICE estimate that approximately 40% of patients in whom warfarin is indicated are not rece ...
... times higher than a person with no AF. Anticoagulants: Warfarin is superior in stroke prevention in AF. AF strokes tend to be more severe Warfarin reduces stroke risk by 64% Aspirin reduces stroke risk by 22% NICE estimate that approximately 40% of patients in whom warfarin is indicated are not rece ...
Telemetry/EKG/Pacers
... - tall athletes (esp basketball players) - aging heart - men more than women - sleeping on left side or stomach etc. ...
... - tall athletes (esp basketball players) - aging heart - men more than women - sleeping on left side or stomach etc. ...
Sudden atrial fibrillation associated with acute
... Follow-up electrocardiogram 10 hours later demonstrated a heart rate of 77 beats per minute and normal sinus rhythm. Transthoracic echocardiogram revealed a left ventricular ejection fraction of 45% and an “incidental” finding of cor triatriatum of the left atrium (Figure 2). Right ventricular systol ...
... Follow-up electrocardiogram 10 hours later demonstrated a heart rate of 77 beats per minute and normal sinus rhythm. Transthoracic echocardiogram revealed a left ventricular ejection fraction of 45% and an “incidental” finding of cor triatriatum of the left atrium (Figure 2). Right ventricular systol ...
Managing Atrial Fibrillation - Scioto County Medical Society
... Implications • AFFIRM has demonstrated that rate control is an acceptable primary therapy in a selected high-risk subgroup of AF patients • Continuous anticoagulation seems warranted in all patients with risk factors for stroke – Asymptomatic recurrences ...
... Implications • AFFIRM has demonstrated that rate control is an acceptable primary therapy in a selected high-risk subgroup of AF patients • Continuous anticoagulation seems warranted in all patients with risk factors for stroke – Asymptomatic recurrences ...
Detection and diagnosis of atrial fibrillation in primary care
... Estimated 2003 prevalence of active/ever diagnosed AF: 1.31% and 1.49% respectively in men, 1.15% and 1.29% respectively in women aged >85 years:13.2% in men and 11% in women. ...
... Estimated 2003 prevalence of active/ever diagnosed AF: 1.31% and 1.49% respectively in men, 1.15% and 1.29% respectively in women aged >85 years:13.2% in men and 11% in women. ...
Atrioventricular Reentrant Tachycardia (AVRT)
... This is a type of supraventricular tachycardia (SVT). This is related to an abnormal “short circuit” in the electrical connections of the heart between the atria and the ventricles (heart chambers.) Episodes of fast heart rates tend to be brief - usually minutes in duration - but can be longer. Gene ...
... This is a type of supraventricular tachycardia (SVT). This is related to an abnormal “short circuit” in the electrical connections of the heart between the atria and the ventricles (heart chambers.) Episodes of fast heart rates tend to be brief - usually minutes in duration - but can be longer. Gene ...
WHAT IS ATRIAL FIBRILLATION?
... Certain lifestyle choices can bring about or exacerbate the condition. For instance, excessive alcohol consumption or using stimulating drugs such as caffeine, decongestants and cocaine can contribute to atrial fibrillation. ...
... Certain lifestyle choices can bring about or exacerbate the condition. For instance, excessive alcohol consumption or using stimulating drugs such as caffeine, decongestants and cocaine can contribute to atrial fibrillation. ...
Atrial fibrillation
Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating. Often it starts as brief periods of abnormal beating which become longer and possibly constant over time. Most episodes have no symptoms. Occasionally there may be heart palpitations, fainting, shortness of breath, or chest pain. The disease increases the risk of heart failure, dementia, and stroke.Hypertension and valvular heart disease are the most common alterable risk factors for AF. Other heart-related risk factors include heart failure, coronary artery disease, cardiomyopathy, and congenital heart disease. In the developing world valvular heart disease often occurs as a result of rheumatic fever. Lung-related risk factors include COPD, obesity, and sleep apnea. Other factors include excess alcohol intake, diabetes mellitus, and thyrotoxicosis. However, half of cases are not associated with one of these risks. A diagnosis is made by feeling the pulse and may be confirmed using an electrocardiogram (ECG). The typical ECG shows no P waves and an irregular ventricular rate.AF is often treated with medications to slow the heart rate to a near normal range (known as rate control) or to convert the rhythm to normal sinus rhythm (known as rhythm control). Electrical cardioversion can also be used to convert AF to a normal sinus rhythm and is often used emergently if the person is unstable. Ablation may prevent recurrence in some people. Depending on the risk of stroke either aspirin or anti-clotting medications such as warfarin or a novel oral anticoagulant may be recommended. While these medications reduce this risk, they increase rates of major bleeding.Atrial fibrillation is the most common serious abnormal heart rhythm. In Europe and North America, as of 2014, it affects about 2% to 3% of the population. This is an increase from 0.4 to 1% of the population around 2005. In the developing world about 0.6% of males and 0.4% of females are affected. The percentage of people with AF increases with age with 0.14% under 50 years old, 4% between 60 and 70 years old, and 14% over 80 years old being affected. A-fib and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. The first known report of an irregular pulse was by John Baptist Senac in 1749. This was first documented by ECG in 1909 by Thomas Lewis.