Definition of terms related to cardiac rhythm
... A premature impulse which usually shows a fixed and probably causal relationship to the preceding activation of the same cardiac chamber. Extrasystoles may also be induced electrically or mechanically. In such cases a causal relationship to the preceding activation is usually absent. (see also captu ...
... A premature impulse which usually shows a fixed and probably causal relationship to the preceding activation of the same cardiac chamber. Extrasystoles may also be induced electrically or mechanically. In such cases a causal relationship to the preceding activation is usually absent. (see also captu ...
NIH Public Access - IUPUI ScholarWorks
... Sympathetic neurotransmission results from the excitation of sympathetic nerve terminals via electrical impulses travelling down the efferent post-synaptic sympathetic nerves, which originate in sympathetic ganglia like the stellates. The production, release, reuptake and degradation of sympathetic ...
... Sympathetic neurotransmission results from the excitation of sympathetic nerve terminals via electrical impulses travelling down the efferent post-synaptic sympathetic nerves, which originate in sympathetic ganglia like the stellates. The production, release, reuptake and degradation of sympathetic ...
The normal range and determinants of the intrinsic heart rate in man
... supply in the rabbit sinus node [69]. There is a large ganglionic complex inferior to the sinus node. Nerves impinge on the sinus node from the direction of the superior and inferior venae cavae and from the interatrial septum. Two or more major intrinsic nerves traverse the sinus node parallel to t ...
... supply in the rabbit sinus node [69]. There is a large ganglionic complex inferior to the sinus node. Nerves impinge on the sinus node from the direction of the superior and inferior venae cavae and from the interatrial septum. Two or more major intrinsic nerves traverse the sinus node parallel to t ...
Module 3 - Cardiac Arrhythmias-Mechanisms of Arrhythmias
... caffeine or nicotine can lead to arrhythmia in some people. A heart attack or an underlying condition that damages the heart's electrical system also can cause an arrhythmia. These conditions include high blood pressure (hypertension), coronary artery disease, heart failure, overactive or underactiv ...
... caffeine or nicotine can lead to arrhythmia in some people. A heart attack or an underlying condition that damages the heart's electrical system also can cause an arrhythmia. These conditions include high blood pressure (hypertension), coronary artery disease, heart failure, overactive or underactiv ...
2014 AATS guidelines for the prevention and management of
... A final draft was prepared by the chairman of the task force and made available in a written form to each member for final comments. Subsequently, the recommendations were posted for public comments for AATS members (via REDCap), and then peer reviewed by outside experts selected by the AATS Council ...
... A final draft was prepared by the chairman of the task force and made available in a written form to each member for final comments. Subsequently, the recommendations were posted for public comments for AATS members (via REDCap), and then peer reviewed by outside experts selected by the AATS Council ...
A Case of Mirror Image Dextrocardia with Ostium Secundum Atrial
... of full term normal delivery; he is apparently normal. On examination, the patient is moderately built and nourished. Pulse: 80 beats per minute, regular, normal volume, normal character, with no radio-radial or radiofemoral delay. Blood pressure: 110/70 mm Hg. Ankle edema: present; no pallor, icter ...
... of full term normal delivery; he is apparently normal. On examination, the patient is moderately built and nourished. Pulse: 80 beats per minute, regular, normal volume, normal character, with no radio-radial or radiofemoral delay. Blood pressure: 110/70 mm Hg. Ankle edema: present; no pallor, icter ...
Atrial myxoma: a review - International Journal Of Community
... but patients below 20 and above 90 years have also been diagnosed with these tumors. Left atrium is the most common site in about 86% of cardiac myxoma, and 90 percent of myxomas are solitary. These tumors usually occur without any predisposing genetic disorder, biatrial and multiple cardiac myxomas ...
... but patients below 20 and above 90 years have also been diagnosed with these tumors. Left atrium is the most common site in about 86% of cardiac myxoma, and 90 percent of myxomas are solitary. These tumors usually occur without any predisposing genetic disorder, biatrial and multiple cardiac myxomas ...
Analysis of the Characteristics of the Flow Velocity Waveforms in Left
... the left atrial surface, we used our newly developed fiber-optic laser Doppler velocimeter. We intended particularly to examine the Influence of atrial contraction and relaxation on velocity waveforms to obtain some insight into the nature of the mechanical force acting on the atrial intramyocardial ...
... the left atrial surface, we used our newly developed fiber-optic laser Doppler velocimeter. We intended particularly to examine the Influence of atrial contraction and relaxation on velocity waveforms to obtain some insight into the nature of the mechanical force acting on the atrial intramyocardial ...
Atrial Fibrillation and Flutter - Cleveland Clinic Center for Continuing
... Narrow Complex Tachycardias ...
... Narrow Complex Tachycardias ...
AHA/ACC Scientific Statement
... sinus bradycardia will exhibit periods of low atrial or junctional escape rhythms with rates of 40 to 60 bpm. This is a normal phenomenon, and these will become suppressed with exercise-induced increases in the sinus rate. Evaluation of the athlete with sinus bradycardia includes a careful history t ...
... sinus bradycardia will exhibit periods of low atrial or junctional escape rhythms with rates of 40 to 60 bpm. This is a normal phenomenon, and these will become suppressed with exercise-induced increases in the sinus rate. Evaluation of the athlete with sinus bradycardia includes a careful history t ...
ECG - A Pictorial Primer
... number of QRS complexes in a 6-second period by 10. For very slow heart rates in which there are few QRS complexes in a 6-second interval, accuracy can be improved by multiplying the number of QRS complexes in a 12-second period by 5. ...
... number of QRS complexes in a 6-second period by 10. For very slow heart rates in which there are few QRS complexes in a 6-second interval, accuracy can be improved by multiplying the number of QRS complexes in a 12-second period by 5. ...
Hypoplastic Left Heart Syndrome: Echocardiographic Assessment
... • PDA usually large, with aorta inserting onto ductal arch • Right to left flow in systole • Left to right in diastole – Diastolic flow reversal in abdominal Ao – L to R decreased with Pulm HTN • PPHTN • Intact atrial septum ...
... • PDA usually large, with aorta inserting onto ductal arch • Right to left flow in systole • Left to right in diastole – Diastolic flow reversal in abdominal Ao – L to R decreased with Pulm HTN • PPHTN • Intact atrial septum ...
File - Cardiac Education
... The specificity of ST-T and U wave abnormalities is provided more by the clinical circumstances in which the ECG changes are found than by the particular changes themselves. Thus the term, nonspecific ST-T wave abnormalities, is frequently used when the clinical data are not available to correlate w ...
... The specificity of ST-T and U wave abnormalities is provided more by the clinical circumstances in which the ECG changes are found than by the particular changes themselves. Thus the term, nonspecific ST-T wave abnormalities, is frequently used when the clinical data are not available to correlate w ...
Importance of Atrial Flutter Isthmus in Postoperative Intra
... considered to be part of the reentrant circuit if the PPI minus the TCL was ⬍10 ms. If the atrial flutter isthmus was not found to be part of the reentrant circuit, alternative atrial sites were mapped by entrainment, particularly near the atriotomy incision. Particular attention was paid to sites w ...
... considered to be part of the reentrant circuit if the PPI minus the TCL was ⬍10 ms. If the atrial flutter isthmus was not found to be part of the reentrant circuit, alternative atrial sites were mapped by entrainment, particularly near the atriotomy incision. Particular attention was paid to sites w ...
Acls pretest rhythm strips
... CA 92108 – (888) 815-0313 – EXPRESSTRAINING.COM Fast, accredited, and online! Get your ACLS, BLS, PALS, or NRP Certification or Recertification from the ACLS Certification Institute. You don't have to be an ECG wizard to pass ACLS. You just need to know a handful of rhythms, and luckily, all these r ...
... CA 92108 – (888) 815-0313 – EXPRESSTRAINING.COM Fast, accredited, and online! Get your ACLS, BLS, PALS, or NRP Certification or Recertification from the ACLS Certification Institute. You don't have to be an ECG wizard to pass ACLS. You just need to know a handful of rhythms, and luckily, all these r ...
Systematic Review: Comparative Effectiveness of Radiofrequency
... The following 3 key questions were formulated: 1. What is the effect of radiofrequency catheter ablation on short-term (6 to 12 months) and long-term (⬎12 months) rhythm control; rates of congestive heart failure; changes in the size of the left atrium and ventricle; rates of stroke; quality of life ...
... The following 3 key questions were formulated: 1. What is the effect of radiofrequency catheter ablation on short-term (6 to 12 months) and long-term (⬎12 months) rhythm control; rates of congestive heart failure; changes in the size of the left atrium and ventricle; rates of stroke; quality of life ...
EKG Review Part I - Emergency Medicine Society at NSU College of
... The wave of depolarization as seen by an EKG machine is obviously related to the cardiac cycle. The “P” wave is the first (normally) positive deflection on the EKG. P waves correspond to atrial depolarization / contraction. The wave of depolarization then progresses to the atrioventricular node. The ...
... The wave of depolarization as seen by an EKG machine is obviously related to the cardiac cycle. The “P” wave is the first (normally) positive deflection on the EKG. P waves correspond to atrial depolarization / contraction. The wave of depolarization then progresses to the atrioventricular node. The ...
Dealing with abnormal Heart rhythms
... An ECG records the electrical activity of your heart. It can show an arrhythmia, but only if it is happening at the time of the ECG. Sometimes an ECG can show features that suggest you might be at risk of an arrhythmia. An ECG is painless and usually takes about five minutes to do. Small sticky patc ...
... An ECG records the electrical activity of your heart. It can show an arrhythmia, but only if it is happening at the time of the ECG. Sometimes an ECG can show features that suggest you might be at risk of an arrhythmia. An ECG is painless and usually takes about five minutes to do. Small sticky patc ...
Dealing with abnormal Heart rhythms
... An ECG records the electrical activity of your heart. It can show an arrhythmia, but only if it is happening at the time of the ECG. Sometimes an ECG can show features that suggest you might be at risk of an arrhythmia. An ECG is painless and usually takes about five minutes to do. Small sticky patc ...
... An ECG records the electrical activity of your heart. It can show an arrhythmia, but only if it is happening at the time of the ECG. Sometimes an ECG can show features that suggest you might be at risk of an arrhythmia. An ECG is painless and usually takes about five minutes to do. Small sticky patc ...
EKG Review Part II
... The wave of depolarization as seen by an EKG machine is obviously related to the cardiac cycle. The “P” wave is the first (normally) positive deflection on the EKG. P waves correspond to atrial depolarization / contraction. The wave of depolarization then progresses to the atrioventricular node. The ...
... The wave of depolarization as seen by an EKG machine is obviously related to the cardiac cycle. The “P” wave is the first (normally) positive deflection on the EKG. P waves correspond to atrial depolarization / contraction. The wave of depolarization then progresses to the atrioventricular node. The ...
NICE (2013) Self-monitoring coagulometers
... and pain in the leg. If it dislodges and travels to the lungs, to the pulmonary arteries, it is called a pulmonary embolism (PE), which in some cases may be fatal. Major risk factors for VTE include a prior history of DVT, age over 60 years, surgery, obesity, prolonged travel, acute medical illness, ...
... and pain in the leg. If it dislodges and travels to the lungs, to the pulmonary arteries, it is called a pulmonary embolism (PE), which in some cases may be fatal. Major risk factors for VTE include a prior history of DVT, age over 60 years, surgery, obesity, prolonged travel, acute medical illness, ...
Nonsurgical closure of secundum atrial septal defect and patent
... increase of the right atrial pressure such as in chronic obstructive lung disease and after pulmonary embolism. The shunt volume depends on PFO size, duration of atrial systole and the pressure difference between the two atria. Left-to-right shunting is usually prevented by complete closure of the P ...
... increase of the right atrial pressure such as in chronic obstructive lung disease and after pulmonary embolism. The shunt volume depends on PFO size, duration of atrial systole and the pressure difference between the two atria. Left-to-right shunting is usually prevented by complete closure of the P ...
Left Anterior Fascicular Block (LAFB)-KH
... Long QT Syndrome - "LQTS" (based on upper limits for heart rate; QT c > 0.47 sec for males and > 0.48 sec in females is diagnostic for hereditary LQTS in absence of other causes of increased QT) This abnormality may have important clinical implications since it usually indicates a state of increased ...
... Long QT Syndrome - "LQTS" (based on upper limits for heart rate; QT c > 0.47 sec for males and > 0.48 sec in females is diagnostic for hereditary LQTS in absence of other causes of increased QT) This abnormality may have important clinical implications since it usually indicates a state of increased ...
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.