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the Right Atrium, Right Ventricle, and Left
the Right Atrium, Right Ventricle, and Left

... Peak systolic pressure was used in the formula of Sarnoff and associates13 for calculation of the tension-time index. All pressures, dp/dt, carotid tracings, and electrocardiograms were simultaneously recorded in the eight-channel Dr-8 oscilloscopic photographic recorder* at a paper speed of 200 mm/ ...
Full Text  - Res Cardiovasc Med
Full Text - Res Cardiovasc Med

... (36.4%), 42 (18.2%), 29 (12.6%), and 5 patients (2.2%) had incomplete right bundle branch block (RBBB), complete RBBB, RBBB with left anterior hemi-block and complete heart block, respectively. The results indicate that the group A patients most likely had cardiac arrhythmia during their ICU stay, a ...
The electrocardiogram in the patient with syncope
The electrocardiogram in the patient with syncope

... are far ranging, including the various ST-segment and T-wave abnormalities of acute coronary syndrome (ACS), ventricular preexcitation as seen in the WPW syndrome, Brugada syndrome with the associated tendency for sudden death, prolonged QT interval common in the diverse long QT interval presentatio ...
Dronedarone for the treatment of atrial fibrillation and atrial flutter
Dronedarone for the treatment of atrial fibrillation and atrial flutter

... of the populations compared to using standard baseline therapy alone as first-line treatment, or compared to sotalol or amiodarone as a firstline antiarrhythmic (Table 2). The results for dronedarone, relative to class 1c agents, showed that dronedarone was borderline in terms of costeffectiveness, ...
“Diastolic heart failure” or heart failure caused by - Heart
“Diastolic heart failure” or heart failure caused by - Heart

... of having this syndrome have alternative explanations for their symptoms (such as chronic lung disease, myocardial ischaemia, obesity) and may not have heart failure at all.16 Even among those who do, there is difficulty in deciding whether “diastolic dysfunction” is present because there are few ag ...
Session Number 206  Content Description
Session Number 206 Content Description

...  Ventricular fibrillation plays a role in most cases of ...
Three-dimensional alignment of the aggregated myocytes in the
Three-dimensional alignment of the aggregated myocytes in the

... using force probes suggest that these intruding myocytes working in conjunction with the fibrous matrix, have an impact on myocardial mechanics (16, 17). When assessing the mechanisms producing myocardial function, therefore, it is important to take note of the intruding angulation of the myocytes a ...
Dual Chamber Pacemakers: Fact Sheet
Dual Chamber Pacemakers: Fact Sheet

... Dual-Chamber Pacemakers: Fact Sheet 13. Prophylactic pacemaker use following recovery from acute myocardial infarction during which there was temporary complete (third-degree) and/or Mobitz Type II second-degree AV block in association with bundle branch block; 14. In patients with recurrent and ...
In Vivo Measurements of Atrial Repolarization Alternans
In Vivo Measurements of Atrial Repolarization Alternans

... atrioventricular (AV) synchrony. The first pacemaker was used to record a broadband (sampling frequency 800 Hz, 0.4 Hz high pass filter) intracardiac unipolar atrial electrogram (EGM), as shown in figure 1, and to perform ventricular pacing during burst pacing. The second pacemaker was used to deliv ...
CHFModuleFY2011Q3 3/03/11 of 3
CHFModuleFY2011Q3 3/03/11 of 3

... record from a previous admission within the past 12 months. If more than one condition are documented, enter in numerical order (dementia, then metastatic, or end stage) disease, then DNR, then hospice). Any type of dementia is applicable, such as Alzheimer’s, vascular, dementia due to HIV, head tra ...
CHFModuleFY2012Q1 10/05/11 of 3
CHFModuleFY2012Q1 10/05/11 of 3

... record from a previous admission within the past 12 months. If more than one condition are documented, enter in numerical order (dementia, then metastatic, or end stage) disease, then DNR, then hospice). Any type of dementia is applicable, such as Alzheimer’s, vascular, dementia due to HIV, head tra ...
Reduced Ventricular Proarrhythmic Potential of the Novel Combined
Reduced Ventricular Proarrhythmic Potential of the Novel Combined

... Key Words: antiarrhythmic drugs 䡲 ion channels 䡲 remodeling 䡲 torsade de pointes ...
normal children - Heart
normal children - Heart

... and therefore diastolic cavity function, increased with been performed longitudinally, but such data acquiage (Fig. 8). This increase did not correlate with any sition is slow, and we hoped that the vagaries of our changes in heart rate, but appeared to result from the cross-sectional study would be ...
AVID - Relative Effectiveness of the ICD and AADs
AVID - Relative Effectiveness of the ICD and AADs

... malignant ventricular arrhythmias regardless of ejection fraction. It is possible that in ventricles with better left ventricular function, amiodarone is relatively more effective in preventing malignant ventricular arrhythmias than in the “sicker” ventricles of patients with moderately and severely ...
Cardiomyopathies and Myocarditides
Cardiomyopathies and Myocarditides

... presents with otherwise unexplained cardiac abnormalities of new onset, such as heart failure, arrhythmias, or conduction disturbances • A history of recent upper respiratory infection or enteritis may also be present • A presumptive diagnosis of cardiomyopathy generally requires that congenital, va ...
normal children - Heart
normal children - Heart

... and therefore diastolic cavity function, increased with been performed longitudinally, but such data acquiage (Fig. 8). This increase did not correlate with any sition is slow, and we hoped that the vagaries of our changes in heart rate, but appeared to result from the cross-sectional study would be ...
Holly Everts, 2010. Atrial Fibrillation
Holly Everts, 2010. Atrial Fibrillation

... heart that is causing the accessory pathway • Radiofrequency energy is transmitted to the pathway and destroys the selected heart muscle cells in a very small area (about 1/5 of an inch). (American Heart Association, 2010). Table of Contents ...
Left Ventricle Remodeling for Patients with Heart Failure and
Left Ventricle Remodeling for Patients with Heart Failure and

... of sarcomers. Nine patients have LV thickness is abnormally increased higher than normal caused by pressure overload as seen in hypertension and aortic stenosis, It is characterized as concentric hypertrophy, and Thirty seven patients have another type of hypertrophy caused by (volume overload) they ...
D Marangoni Papers on T Wave Alternans
D Marangoni Papers on T Wave Alternans

... Under current clinical practice, we evaluate and treat with only a small high-risk population of cardiac arrest survivors and a tiny fraction of other risk groups. If we are to make a substantial impact on total death mortality, we must begin to evaluate and treat larger groups at risk. To simply do ...
Guidelines ICD implantation 2005 – an update
Guidelines ICD implantation 2005 – an update

... cannot be excluded that at least some of the patients, with for example multivessel coronary artery disease, who were included in the trial may have been candidates for a revascularization procedure alone. Fourthly, retrospective analysis performed by the MADIT II investigators showed a lesser bene ...
Stretch-induced modifications of myocardial performance: from
Stretch-induced modifications of myocardial performance: from

... Studies performed on isolated papillary muscles by Sonnenblick and his group [26-281 analyzed in detail the interrelations between force, length and velocity of shortening. The force-length diagram obtained with different preloads and for different types of contractions (isometric or isotonic) descr ...
Ligation of the Outflow Graft of the Left Ventricular
Ligation of the Outflow Graft of the Left Ventricular

... surge in Heartmate II LVAD device thrombosis [1]. Recently, Starling et al [2] summarized the experience of 3 US centers with 72 confirmed HeartMate II pump thromboses. A significant 6-month actuarial mortality (48.2%) was noted in those patients managed medically without heart transplant or pump ex ...
Combined right ventricular systolic and diastolic dysfunction
Combined right ventricular systolic and diastolic dysfunction

... T Mark for statistically significant difference ( pb0.05) between patients with or without event. ...
Velocity of Left Ventricular Contraction in Man
Velocity of Left Ventricular Contraction in Man

... ventricular ejection, which are volume-dependent parameters of myocardial performance, the mean rate of cirDr. McDonald was a Lederle International Fellow and a San Francisco Heart Association Fellow in the Cardiovascular Research Institute, University of California Medical Center, San Francisco. Dr ...
Crescendo in Depolarization and Repolarization
Crescendo in Depolarization and Repolarization

... Ischemic ...
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Ventricular fibrillation



Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.
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