ch 11 day 2
... FIGURE 11.6 The intrinsic conduction system of the heart. The depolarization wave initiated by the sinoatrial (SA) node passes successively through the atrial myocardium to the atrioventricular (AV) node, the AV bundle, the right and left bundle branches, and the Purkinje fibers in the ventricular ...
... FIGURE 11.6 The intrinsic conduction system of the heart. The depolarization wave initiated by the sinoatrial (SA) node passes successively through the atrial myocardium to the atrioventricular (AV) node, the AV bundle, the right and left bundle branches, and the Purkinje fibers in the ventricular ...
hypertrophic cardiomyopathy diagnosis and management
... Supraventricular tachycardia (46 percent) Premature ventricular contractions (43 percent) Nonsustained ventricular tachycardia (26 percent) Atrial fibrillation (25 to 30 percent ) Preexcitation has also been associated with HCM ...
... Supraventricular tachycardia (46 percent) Premature ventricular contractions (43 percent) Nonsustained ventricular tachycardia (26 percent) Atrial fibrillation (25 to 30 percent ) Preexcitation has also been associated with HCM ...
Atrial Baffle Stenosis: A Late Complication after Mustard Repair for d
... D-transposition of the great arteries (d-TGA) refers to the dextroposition of the bulboventricular loop and ventriculoarterial discordance (1). Due to failure of spiral septation of the truncus arteriosus, the great arteries course parallel to each other rather than crossing. The aorta arises from t ...
... D-transposition of the great arteries (d-TGA) refers to the dextroposition of the bulboventricular loop and ventriculoarterial discordance (1). Due to failure of spiral septation of the truncus arteriosus, the great arteries course parallel to each other rather than crossing. The aorta arises from t ...
Arrhythmia - British Heart Foundation
... Join our fight for every heartbeat in the UK. Every pound raised, minute of your time and donation to our shops will help make a difference to people’s lives. ...
... Join our fight for every heartbeat in the UK. Every pound raised, minute of your time and donation to our shops will help make a difference to people’s lives. ...
Ventricular arrhythmias - An
... sinus impulses will pass through the AV node at slower and slower rates until excitation is actually blocked After that the cycle of delay-delayblock repeats itself ...
... sinus impulses will pass through the AV node at slower and slower rates until excitation is actually blocked After that the cycle of delay-delayblock repeats itself ...
Anatomy Review: The Heart
... __ b. Convey the action potential to the contractile cells of the ventricle. __ c. Delays the action potential while the atria contract. __ d. Links the SA node to the AV node, distributing the action potential to the contractile cells of the atria. __ e. Electrically connects the atria and the vent ...
... __ b. Convey the action potential to the contractile cells of the ventricle. __ c. Delays the action potential while the atria contract. __ d. Links the SA node to the AV node, distributing the action potential to the contractile cells of the atria. __ e. Electrically connects the atria and the vent ...
Complete Heart Block
... The heart of the dog or cat is composed of four chambers; the top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or ―pacemaker‖ ...
... The heart of the dog or cat is composed of four chambers; the top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or ―pacemaker‖ ...
complete_heart_block
... top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the elect ...
... top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the elect ...
Complete Heart Block - Milliken Animal Clinic
... top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles • In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the elect ...
... top two chambers are the right and left atria and the bottom two chambers are the right and left ventricles • In order to pump blood to the lungs and body, the heart must work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the elect ...
second-degree_heart_block_(mobitz_i)
... work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the electrical impulse to begin the coordinated contraction of the heart muscles—the electrical impulse causes the atria to contract, pumping blood into the ventricles; the electri ...
... work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the electrical impulse to begin the coordinated contraction of the heart muscles—the electrical impulse causes the atria to contract, pumping blood into the ventricles; the electri ...
Second-Degree Heart Block (Second-Degree Atrioventricular Block
... work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the electrical impulse to begin the coordinated contraction of the heart muscles—the electrical impulse causes the atria to contract, pumping blood into the ventricles; the electri ...
... work in a coordinated fashion; the normal control or “pacemaker” of the heart is the sinoatrial (SA) node, which starts the electrical impulse to begin the coordinated contraction of the heart muscles—the electrical impulse causes the atria to contract, pumping blood into the ventricles; the electri ...
1893
... right atrial dilatation, the U wave, notching of the QRS complex, ventricular extrasystoles, ventricular bigeminy, atrial flutter and total AV block. 1924: He was awarded the Nobel Prize in Medicine for his discovery. Modern History: Though the basic principles of that era are still in use today, th ...
... right atrial dilatation, the U wave, notching of the QRS complex, ventricular extrasystoles, ventricular bigeminy, atrial flutter and total AV block. 1924: He was awarded the Nobel Prize in Medicine for his discovery. Modern History: Though the basic principles of that era are still in use today, th ...
The Heart
... Disorders of the Cardiac Conduction System ---- Arrhythmias - refers to abnormal initiation or conduction of electrical impulses in the heart. - caused by ischemia, fibrosis, inflammation, or drugs. ...
... Disorders of the Cardiac Conduction System ---- Arrhythmias - refers to abnormal initiation or conduction of electrical impulses in the heart. - caused by ischemia, fibrosis, inflammation, or drugs. ...
Backgrounder: The Risk of Stroke in Atrial Fibrillation
... To assess the right course of treatment in AF-related stroke prophylaxis, there are several sets of international, European and country-specific guidelines, and various methods exist to categorise stroke risk. The simplest risk assessment scheme is the CHADS2 score, which is based on a point system ...
... To assess the right course of treatment in AF-related stroke prophylaxis, there are several sets of international, European and country-specific guidelines, and various methods exist to categorise stroke risk. The simplest risk assessment scheme is the CHADS2 score, which is based on a point system ...
Valvular Heart Disease
... into left atrium during systole Usually benign, but may progress to mitral regurgitation Affects 5%-10% of the population (most common in women 14-30). ...
... into left atrium during systole Usually benign, but may progress to mitral regurgitation Affects 5%-10% of the population (most common in women 14-30). ...
1 The Cardiac Cycle - Hamilton Grammar School Science Website
... Atrial systole transfers the remainder of the blood through the atrioventricular (AV) valves to the ventricles. Ventricular systole closes the AV valves and pumps the blood out through the semi lunar (SL) valves to the aorta and pulmonary artery. In diastole the higher pressure in the arteries close ...
... Atrial systole transfers the remainder of the blood through the atrioventricular (AV) valves to the ventricles. Ventricular systole closes the AV valves and pumps the blood out through the semi lunar (SL) valves to the aorta and pulmonary artery. In diastole the higher pressure in the arteries close ...
Arrhythmia Overview
... node. These "pacemaker" cells send a regular electrical impulse to start the contraction of the heart. A normal heart rate is between 50 and 100 beats per minute. Heart rhythm can be affected by too much alcohol or stress. The most common causes of arrhythmias are: - abnormal heart valve function - ...
... node. These "pacemaker" cells send a regular electrical impulse to start the contraction of the heart. A normal heart rate is between 50 and 100 beats per minute. Heart rhythm can be affected by too much alcohol or stress. The most common causes of arrhythmias are: - abnormal heart valve function - ...
ACLS Drug Overview
... NITROGLYCERIN Sublingual or IV drip. Vasodilator. Useful in the relief of chest pain in angina/unstable angina or ACS, antihypertensive, CHF. ...
... NITROGLYCERIN Sublingual or IV drip. Vasodilator. Useful in the relief of chest pain in angina/unstable angina or ACS, antihypertensive, CHF. ...
Heart Failure and Anti
... • Result from disturbances in impulse formation or conduction defects • Abnormal impulse formation--Automaticity allows for other than the SA node to depolarize given certain conditions—may be 2ndary to hypoxia, ischemia, lyte imbalance, acid-base disturbances ...
... • Result from disturbances in impulse formation or conduction defects • Abnormal impulse formation--Automaticity allows for other than the SA node to depolarize given certain conditions—may be 2ndary to hypoxia, ischemia, lyte imbalance, acid-base disturbances ...
Rhythmical Excitation of the Heart
... The rhythmical electrical impulses in a normal heart allows: • The atria to contract about one sixth of a second ahead of ventricular contraction. • Allows ventricular filling before they pump the blood through the lungs and peripheral circulation. • Allows all portions of the ventricles to contrac ...
... The rhythmical electrical impulses in a normal heart allows: • The atria to contract about one sixth of a second ahead of ventricular contraction. • Allows ventricular filling before they pump the blood through the lungs and peripheral circulation. • Allows all portions of the ventricles to contrac ...
AV node block
... Normal conduction pathway: SA node -> atrial muscle -> AV node -> bundle of His -> Left and ...
... Normal conduction pathway: SA node -> atrial muscle -> AV node -> bundle of His -> Left and ...
EKG Extravaganza!
... Medications that block potassium channels Congenital abnormality (Long QT syndrome) ...
... Medications that block potassium channels Congenital abnormality (Long QT syndrome) ...
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.