Cardiac output and Venous Return
... In figure B, the depolarization vector is large because half of the ventricle is depolarized. Lead II should be largest voltage when compared to I and III when the mean vector is 60o. In figure C, left side is slower to depolarize. In figure D, the last part to depolarize is near the left base of th ...
... In figure B, the depolarization vector is large because half of the ventricle is depolarized. Lead II should be largest voltage when compared to I and III when the mean vector is 60o. In figure C, left side is slower to depolarize. In figure D, the last part to depolarize is near the left base of th ...
Preparatory Activity: The Electrical System of the Heart
... 4. A. Mechanical events of the heart must be preceded by an electrical event. Explain why. Electrical events, i.e. action potentials, trigger muscle contractions by changing membrane permeability to calcium (Ca+2) ions. B. Depolarization and repolarization are the two electrical events of the heart ...
... 4. A. Mechanical events of the heart must be preceded by an electrical event. Explain why. Electrical events, i.e. action potentials, trigger muscle contractions by changing membrane permeability to calcium (Ca+2) ions. B. Depolarization and repolarization are the two electrical events of the heart ...
Chapter41 - Hatzalah of Miami-Dade
... Ventricular Fibrillation • Rapid, completely disorganized rhythm • Deadly arrhythmia that requires immediate treatment ...
... Ventricular Fibrillation • Rapid, completely disorganized rhythm • Deadly arrhythmia that requires immediate treatment ...
Segmental Approach to CHD and Evaluation of Intracardiac
... • Membrane develops between the common pulmonary vein and the left atrium resulting in stenosis • Membrane lies between the entrance of the pulmonary veins posteriorly and the foramen ovale and the left atrial appendage anteriorly, in contrast to supra-mitral ring which attaches between the foramen ...
... • Membrane develops between the common pulmonary vein and the left atrium resulting in stenosis • Membrane lies between the entrance of the pulmonary veins posteriorly and the foramen ovale and the left atrial appendage anteriorly, in contrast to supra-mitral ring which attaches between the foramen ...
ECG TUTORIAL: How to Analyze A Rhythm - sha
... cardiacpacemaker site shifts between the sinoatrial node (SA node), the atria, and/or the atrioventricular node (AV node). • In an accessory conduction pathway is present between the atria and the ventricles. • Electrical impulses are rapidly conducted to the ventricles. • These rapid impulses creat ...
... cardiacpacemaker site shifts between the sinoatrial node (SA node), the atria, and/or the atrioventricular node (AV node). • In an accessory conduction pathway is present between the atria and the ventricles. • Electrical impulses are rapidly conducted to the ventricles. • These rapid impulses creat ...
c34f30ef92c9b40
... • Are the P waves regular ? • Is the P wave normal and upright in lead II ? • Do all P waves look alike ...
... • Are the P waves regular ? • Is the P wave normal and upright in lead II ? • Do all P waves look alike ...
Sinus Rhythms
... Premature Beats Common occurrences in most individuals. Premature ventricular complexes are observed in 60% of healthy adults in 24 hour monitoring. However, these can also result from disease or toxic conditions, i.e. ischemia, infection, inflammation, drug toxicity, overstimulation with sympatheti ...
... Premature Beats Common occurrences in most individuals. Premature ventricular complexes are observed in 60% of healthy adults in 24 hour monitoring. However, these can also result from disease or toxic conditions, i.e. ischemia, infection, inflammation, drug toxicity, overstimulation with sympatheti ...
Downloadable PDF format, 3.5 MB
... therapy. Standard diagnostic techniques such as the electrocardiogram (ECG) provide only low-resolution projections of cardiac electrical activity on the body surface. Here we demonstrate the successful application in humans of a new imaging modality called electrocardiographic imaging (ECGI), which ...
... therapy. Standard diagnostic techniques such as the electrocardiogram (ECG) provide only low-resolution projections of cardiac electrical activity on the body surface. Here we demonstrate the successful application in humans of a new imaging modality called electrocardiographic imaging (ECGI), which ...
How do arrhythmias occur? - Anesthesiology, Pharmacology and
... Types of tachyarrhythmias (not an exhaus8ve list!) • Supraventricular tachycardia – no more than 200 beats per min. Trivial compared to the other types, but dangerous if spreads from atria to ventricles. ...
... Types of tachyarrhythmias (not an exhaus8ve list!) • Supraventricular tachycardia – no more than 200 beats per min. Trivial compared to the other types, but dangerous if spreads from atria to ventricles. ...
Cardiovascular Lecture:
... c. fetal: shunt moves blood through septum in foramen ovale into LA, if blood gets to RVand pulmonary trunk meets 2nd shunt (ductus arteriosus) ...
... c. fetal: shunt moves blood through septum in foramen ovale into LA, if blood gets to RVand pulmonary trunk meets 2nd shunt (ductus arteriosus) ...
Tachyarrhythmias - patient information
... Atrial fibrillation (AF) is one of the most common types of arrhythmia. AF occurs in the atria. The electrical impulse normally originates at the SA node. However in atrial fibrillation, many electrical impulses are fired rapidly and at random throughout the atria down to the ventricles. The resulti ...
... Atrial fibrillation (AF) is one of the most common types of arrhythmia. AF occurs in the atria. The electrical impulse normally originates at the SA node. However in atrial fibrillation, many electrical impulses are fired rapidly and at random throughout the atria down to the ventricles. The resulti ...
5 HOW TO READ AN EKG
... PR Interval: Atrial and AV node depolarization. Regular duration is 0.12 - 0.20 seconds. The PR interval is measured from the start of the P wave to the start of Q wave. It represents the duration of atria depolarization. Normal duration is from 0.12 to 0.20 seconds. If the PR interval is greater th ...
... PR Interval: Atrial and AV node depolarization. Regular duration is 0.12 - 0.20 seconds. The PR interval is measured from the start of the P wave to the start of Q wave. It represents the duration of atria depolarization. Normal duration is from 0.12 to 0.20 seconds. If the PR interval is greater th ...
ECG Interpretation
... areas of diminished blood flow near atrial walls --> “mural thrombi” along atrial walls --> break off --> __________________ ...
... areas of diminished blood flow near atrial walls --> “mural thrombi” along atrial walls --> break off --> __________________ ...
Read booklet - Heart Rhythm Alliance
... and women of all ages can be affected. In general terms, the likelihood of developing AF increases with age.5 However, some people appear to be at a higher genetic risk and this predisposition to AF is most often seen in young patients.6 In addition, some studies suggest the incidence of AF is higher ...
... and women of all ages can be affected. In general terms, the likelihood of developing AF increases with age.5 However, some people appear to be at a higher genetic risk and this predisposition to AF is most often seen in young patients.6 In addition, some studies suggest the incidence of AF is higher ...
Transcript
... But, there are other targets in the process, as well, alluded to in those prior slides that include the structural remodeling and fibrosis GAP junction, therapeutic targets, especially those specific to atrial conduction and some atrial selective ion channel targets as well, and I’ll talk a little b ...
... But, there are other targets in the process, as well, alluded to in those prior slides that include the structural remodeling and fibrosis GAP junction, therapeutic targets, especially those specific to atrial conduction and some atrial selective ion channel targets as well, and I’ll talk a little b ...
Vipul Brahmbhatt
... Concordance R wave in precordial Leads either + or –(High specificity but low sensitivity about 20%) ## Remember AVART (1-6% of WCT) ...
... Concordance R wave in precordial Leads either + or –(High specificity but low sensitivity about 20%) ## Remember AVART (1-6% of WCT) ...
Left atrium phasic volume assessment: Its application in stroke patients
... Stroke is one of the most common causes of morbidity and mortality. The survivors of stroke have a risk of recurrence that leads to long-term disability and death. Embolism with a cardiac origin, however, is difficult to document, but accounts for approximately 20% of ischemic stroke. The emboli are ...
... Stroke is one of the most common causes of morbidity and mortality. The survivors of stroke have a risk of recurrence that leads to long-term disability and death. Embolism with a cardiac origin, however, is difficult to document, but accounts for approximately 20% of ischemic stroke. The emboli are ...
Antiarrythmic drugs
... This type of action potential is found in non-nodal cardiomyocytes ( atria, ventricles, purkinje tissues which are depending on sodium to start depolarization ) ...
... This type of action potential is found in non-nodal cardiomyocytes ( atria, ventricles, purkinje tissues which are depending on sodium to start depolarization ) ...
Third Degree Atrioventricular Block Explained
... In some cases we may give your pet an injection of a drug called atropine and perform an ‘atropine response test’. In a normal functioning heart this drug will speed up the rate of contraction, however atropine will have no effect on an animal with 30 AV block. IS THERE TREATMENT FOR 30 ATRIOVENTRIC ...
... In some cases we may give your pet an injection of a drug called atropine and perform an ‘atropine response test’. In a normal functioning heart this drug will speed up the rate of contraction, however atropine will have no effect on an animal with 30 AV block. IS THERE TREATMENT FOR 30 ATRIOVENTRIC ...
Cardiac Arrhythmias and Their Effect on Performance
... node, the timing and morphology of the QRS complex will be abnormal. Because normally the ventricles are driven by atrial depolarization, every P wave should be followed by a QRS complex, and every QRS complex should be preceded by a P wave. If the P wave is not followed by a QRS complex, atrial dep ...
... node, the timing and morphology of the QRS complex will be abnormal. Because normally the ventricles are driven by atrial depolarization, every P wave should be followed by a QRS complex, and every QRS complex should be preceded by a P wave. If the P wave is not followed by a QRS complex, atrial dep ...
Management of Arrythmias in Intensive Care Unit - e
... • Atrial Fibrillation (AF) Atrial fibrillation is the most common arrhythmia in the ICU. The prevalence of AF in the general population increases exponentially with advancing age. Risk factors for the development of AF include structural heart disease (70% in Framingham study over 22 year follow up) ...
... • Atrial Fibrillation (AF) Atrial fibrillation is the most common arrhythmia in the ICU. The prevalence of AF in the general population increases exponentially with advancing age. Risk factors for the development of AF include structural heart disease (70% in Framingham study over 22 year follow up) ...
Lesson Four - CatsTCMNotes
... Catheterization of the left side of the heart via the femoral artery, or the right side of the heart via the IVC. Dye is injected to assess anatomy of the heart and patency of the coronary arteries. If aortic stenosis is present the left heart can be assessed from the right heart via the “trans-sept ...
... Catheterization of the left side of the heart via the femoral artery, or the right side of the heart via the IVC. Dye is injected to assess anatomy of the heart and patency of the coronary arteries. If aortic stenosis is present the left heart can be assessed from the right heart via the “trans-sept ...
Cardiac Ablation - Texas Cardiac Arrhythmia Institute
... According to the Heart Rhythm Society, ablation is successful in over 90 percent of the cases for many types of arrhythmia. But some people need repeat procedures, and some still need to take arrhythmia medication. ...
... According to the Heart Rhythm Society, ablation is successful in over 90 percent of the cases for many types of arrhythmia. But some people need repeat procedures, and some still need to take arrhythmia medication. ...
Full Article (PDF file)
... associated GERD, there are also other possible risk factors that can induce AF such as ischemic heart disease, chronic heart failure and thyroid dysfunction. For a 77-year old patient, it is difficult to completely rule out the presence of ischemic heart disease without performing coronarography. Ho ...
... associated GERD, there are also other possible risk factors that can induce AF such as ischemic heart disease, chronic heart failure and thyroid dysfunction. For a 77-year old patient, it is difficult to completely rule out the presence of ischemic heart disease without performing coronarography. Ho ...
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.