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Role of Atrio-Ventricular Junction Ablation in Symptomatic Atrial
Role of Atrio-Ventricular Junction Ablation in Symptomatic Atrial

... tolerance, peak oxygen uptake, quality of life and NYHA class was observed equally in the AF and sinus rhythm groups at 12 months follow up.33 However this study did not offer definitive evidence as the sample size was small and it was not powered to examine differences between subgroups. In a pre-s ...
View Dhiraj Gupta`s Resume / CV
View Dhiraj Gupta`s Resume / CV

... (LHCH) since 2007. LHCH provides a regional electrophysiology (EP) service to a population of 2.8 million, and is the largest cardiac centre in the United Kingdom. I am a very high volume operator in interventional EP, and have performed over 200 ablation cases annually since 2009. I am the trust le ...
Clinical Pathology Conference “62 year old woman with weakness
Clinical Pathology Conference “62 year old woman with weakness

... – Continuity between the left ventricular cavity and the deep intratrabecular recesses, which are filled with blood – No communication to epicardial coronaries ...
The Teleost Heart: A Morphological Approach*
The Teleost Heart: A Morphological Approach*

... variability (Santer 1985; Farrell and Jones 1992). Indeed, this assertion can be applied to all fish heart ventricles (Santer 1985). The external shape, the architectural organization, the histology, the coronary distribution, the relative mass, the work dynamics, etc., vary widely between species. ...
Myocardium 2013
Myocardium 2013

... During the active phase of myocarditis, the heart may appear normal or enlarged with dilatation of either ventricle or all chambers. The lesions may be diffuse or patchy. The ventricular myocardium is typically flabby and often mottled by either pale foci or minute hemorrhagic lesions. The endocardi ...
Optimal Control Aspects of Left Ventricular Ejection - IME-USP
Optimal Control Aspects of Left Ventricular Ejection - IME-USP

... it is by no means clear what performance criteria are relevant for biological systems, optimization seems to be a worthwhile viewpoint both for theoretical analysis, as for suggesting new experiments. Specifically, in the present problem, our aim is to apply dynamic optimization theory to the mechan ...
Ratio of Peak Early to Late Diastolic Filling Velocity of the Left
Ratio of Peak Early to Late Diastolic Filling Velocity of the Left

... a semi-invasive tool, its importance in acute stroke care is increasing. Transthoracic echocardiography (TTE)is accepted as a non-invasive assessment for cardiac structural and functional abnormalities worldwide. Furthermore, many recent clinical studies have clearly shown that the analysis of the t ...
I. Sinus rhythms and arrhythmias A. Records the impulse originating
I. Sinus rhythms and arrhythmias A. Records the impulse originating

... 1. Monitor patient, watch for progression to a higher degree of block 2. Review use of Digoxin, calcium channel blockers, and beta blockers XXVI. Second Degree AV Block, type I ( Mobitz I, Wenckebach) A. Each successive impulse from the SA node is delayed slightly longer than the previous impulse un ...
Acute Myocardial Infarction - J
Acute Myocardial Infarction - J

... Organization for the Assessment of Strategies for Ischemic Syndromes (OASIS)-6 trial, or in a combined analysis of these data with the Clinical Trial of Reviparin and Metabolic Modulation in Acute Myocardial Infarction Treatment and Evaluation-Estudios Clinicos Latino America (CREATEECLA).62,63 Eico ...
Left ventricular mass and cardiovascular morbidity in
Left ventricular mass and cardiovascular morbidity in

... software for hypertension laboratories provided by ANMCO and sent to the study headquarters in Florence. Prespecified primary outcome events included fatal and nonfatal MI, sudden cardiac death, fatal and nonfatal stroke, other cardiovascular deaths, all-cause death, severe heart failure requiring h ...
Effect of dual-chamber pacing on systolic and diastolic
Effect of dual-chamber pacing on systolic and diastolic

... mid-diastole during long RR intervals. A 6F multipurpose catheter was then placed in the ascending aorta just superior to the aortic valve. All pressures were recorded at end expiration directly into a digital format at 5-ms intervals. A thermodilution right heart catheter was placed in the pulmonar ...
Relation of left ventricular twist and global strain with right ventricular
Relation of left ventricular twist and global strain with right ventricular

... Current surgical techniques have improved the clinical outcome of patients with tetralogy of Fallot.(1) However, after the third postoperative decade, the risk of death increases dramatically. (2) Recent studies have demonstrated that reduced left ventricular (LV) ejection fraction and right ventric ...
Objective and Subjective Analysis of Left Ventricular
Objective and Subjective Analysis of Left Ventricular

... and a newly devised quantitative system to evaluate wall motion and two others using only visual inspection of the angiograms. Objective analysis repeated by the same observer correlated well for end-diastolic and end-systolic volumes and ejection fraction (r = .98, .99, .99, respectively) and only ...
Contemporary management of acute right ventricular failure: a
Contemporary management of acute right ventricular failure: a

... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
Contemporary management of acute right ventricular failure: a
Contemporary management of acute right ventricular failure: a

... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
Left ventricular diastolic function assessed using Doppler
Left ventricular diastolic function assessed using Doppler

... diastolic function, most studies have failed to show significant correlations between Doppler derived transmitral velocities and the severity of left ventricular hypertrophy, symptoms, exercise capacity, or mean left atrial pressure in patients with hypertrophic cardiomyopathy.6 7 9 11 12 Convention ...
Computational modeling of cardiac electrophysiology
Computational modeling of cardiac electrophysiology

... can be analyzed and interpreted in the two-dimensional phase space as illustrated in Figure 2 (left). The dashed lines represent the two nullclines for r = 13 3 − for ˙ = 0 and r = [a −]/b for ṙ = 0, respectively. The nullclines are assumed to have a single intersection point that represents th ...
IOSR Journal Of Humanities And Social Science (IOSR-JHSS)
IOSR Journal Of Humanities And Social Science (IOSR-JHSS)

... the pre-test is due to the special resistance training method that was used in this study, because the special type of the resistance training is one of the factors effecting on the cardiac variables (25). The increase in the volume of the left ventricle hole shows the volume overload on the heart t ...
When CRT May Run Proarrhythmic Effect?
When CRT May Run Proarrhythmic Effect?

... • CRT improves exercise capacity, quality of life and functional class in patients with severe drug refractory CHF form LV dysfunction and electrical dyssynchrony • Patients with CHF are at risk for SCD due to monomorphic ventricular tachycardia and ventricular fibrillation • It is generally accept ...
Cardiac Arrhythmias - CarolinaSleepSociety
Cardiac Arrhythmias - CarolinaSleepSociety

... The ectopic beat is not preceded by a p-wave Irregular rhythm due to ectopic beat Rate will be determined by the underlying rhythm QRS is wide and may be bizarre in appearance Caused by a irritable focus within the ventricle ...
9. cardiac cycle and heart sounds
9. cardiac cycle and heart sounds

... •  Throughout  this  and  the  previous   two  phases,  the  atrium  in  diastole   has  been  filling  with  blood  on  top  of   the  closed  AV  valve,  causing  atrial   pressure  to  rise  gradually  (yellow).   •  The  "v"  wave ...
Marathon run: cardiovascular adaptation and
Marathon run: cardiovascular adaptation and

... The first marathon run as an athletic event took place in the context of the Olympic Games in 1896 in Athens, Greece. Today, participation in a ‘marathon run’ has become a global phenomenon attracting young professional athletes as well as millions of mainly middle-aged amateur athletes worldwide ea ...
Hypertrophic Cardiomyopathy
Hypertrophic Cardiomyopathy

... practice and subsequently arrests. He had been having some exertional dyspnea for a few months prior to this incident but it did not affect his activity level. He was told growing up that he had a “heart murmur” that was never formally investigated. He was taking no medications, and there was no fam ...
Cardiac Responses to Increased Afterload
Cardiac Responses to Increased Afterload

... hypertensive subjects. The physician treating a hypertensive patient wishes to know what effects the afterload has on cardiac output, on the energy requirements of the myocardium, and on the tendency to induce myocardial hypertrophy. These effects depend at least as much on cardiac as on vascular fa ...
Evidence of Structural Remodeling in the Dyssynchronous Failing
Evidence of Structural Remodeling in the Dyssynchronous Failing

... alignment (Fig. 1) and used as the normal template. Regions in the anterior, lateral, posterior, and septum of this template were selected and corresponding regions in each target anatomy were identified. RWT within corresponding regions at the base and apex are shown in Table 1. The normal populati ...
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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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