Evaluation of global left ventricular function assessment by dual
... single frames from a manually selected phase in the cardiac cycle are used, the quality analyses for LV functional analyses focus more on LV wall motion delineation. It is, therefore, important to note the fact that if coronary artery analysis is possible on a particular DSCT dataset, this does ...
... single frames from a manually selected phase in the cardiac cycle are used, the quality analyses for LV functional analyses focus more on LV wall motion delineation. It is, therefore, important to note the fact that if coronary artery analysis is possible on a particular DSCT dataset, this does ...
The Effects of External Electric Currents on the Heart
... effective circulation was maintained contiluously without ill effect for many hours by the external electric pacemaker. In the presence of myo(ardial depression from drugs, shock, anoxia, or myocardial ischemia, an effectiv e myocardial contraction may not always followv every electrocardiographi( v ...
... effective circulation was maintained contiluously without ill effect for many hours by the external electric pacemaker. In the presence of myo(ardial depression from drugs, shock, anoxia, or myocardial ischemia, an effectiv e myocardial contraction may not always followv every electrocardiographi( v ...
THE CARDIAC CYCLE
... The c wave occurs when the ventricles begin to contract; it is caused partly by slight backflow of blood into the atria at the onset of ventricular contraction but mainly by bulging of the A-V valves backward toward the atria because of increasing pressure in the ventricles. The v wave occurs toward ...
... The c wave occurs when the ventricles begin to contract; it is caused partly by slight backflow of blood into the atria at the onset of ventricular contraction but mainly by bulging of the A-V valves backward toward the atria because of increasing pressure in the ventricles. The v wave occurs toward ...
atrial septal defect?
... closure for treatment of a PFO?...................................4 What is an atrial septal defect?.....................................5 What effect does an ASD have on the body?.....................6 How does a catheter-based procedure compare to surgery for closure of an ASD or PFO?............. ...
... closure for treatment of a PFO?...................................4 What is an atrial septal defect?.....................................5 What effect does an ASD have on the body?.....................6 How does a catheter-based procedure compare to surgery for closure of an ASD or PFO?............. ...
VECTORIAL ANALYSIS OF ECG
... About how to calculate the rate from ECG tracing About ruleof 300 About sinus rhythm About sinus brady and tachycardia About overdrive supression ...
... About how to calculate the rate from ECG tracing About ruleof 300 About sinus rhythm About sinus brady and tachycardia About overdrive supression ...
Differential Diagnosis of Wide QRS Complex Tachycardia
... * In V1 :Either rS or QS with rapid initial forces (narrow R with rapid smooth descent to S )is seen in LBBB type aberration. Any other pattern such as broad R/deep S or QS with slow descent to S wave nadir will imply VT. If the initial R is wider than 30 msec it suggest VT , the wider the R , the g ...
... * In V1 :Either rS or QS with rapid initial forces (narrow R with rapid smooth descent to S )is seen in LBBB type aberration. Any other pattern such as broad R/deep S or QS with slow descent to S wave nadir will imply VT. If the initial R is wider than 30 msec it suggest VT , the wider the R , the g ...
Canadian Implantable Defibrillator Study (CIDS)
... Methods and Results—A total of 659 patients with resuscitated VF or VT or with unmonitored syncope were randomly assigned to treatment with the ICD or with amiodarone. The primary outcome measure was all-cause mortality, and the secondary outcome was arrhythmic death. A total of 328 patients were ra ...
... Methods and Results—A total of 659 patients with resuscitated VF or VT or with unmonitored syncope were randomly assigned to treatment with the ICD or with amiodarone. The primary outcome measure was all-cause mortality, and the secondary outcome was arrhythmic death. A total of 328 patients were ra ...
multivalvular infective endocarditis clinical features
... infective endocarditis as determined by the Duke criteria. Subsequently, they were divided into two groups: Group 1: multivalvular endocarditis patients (29 patients), Group 2: monovalvular endocarditis patients (196 patients). Group 1 patients were younger. Male sex was predominant in the two group ...
... infective endocarditis as determined by the Duke criteria. Subsequently, they were divided into two groups: Group 1: multivalvular endocarditis patients (29 patients), Group 2: monovalvular endocarditis patients (196 patients). Group 1 patients were younger. Male sex was predominant in the two group ...
CTA accreditation document- final -10-01-10
... predictive value, making it a highly reliable investigation for ruling out significant CAD. This is particularly true in patients with low to intermediate pre-test probability of coronary artery disease. However, it should be noted that these studies have been performed in centres of excellence with ...
... predictive value, making it a highly reliable investigation for ruling out significant CAD. This is particularly true in patients with low to intermediate pre-test probability of coronary artery disease. However, it should be noted that these studies have been performed in centres of excellence with ...
PVCs - Brandon Cardiology, PA
... Most people with premature ventricular contractions and an otherwise normal heart won't need treatment. Rarely, if you have frequent, bothersome symptoms, you may be offered treatment to help you feel better, but PVCs are typically not harmful. In some cases, if you have underlying heart disease tha ...
... Most people with premature ventricular contractions and an otherwise normal heart won't need treatment. Rarely, if you have frequent, bothersome symptoms, you may be offered treatment to help you feel better, but PVCs are typically not harmful. In some cases, if you have underlying heart disease tha ...
Influence of exercise training on cardiac baroreflex sensitivity in
... Cardiac autonomic nervous system dysregulation is established in COPD patients. Although the cause is still unclear, several factors could be suspected, including hypoxaemia, poor physical fitness and chronic pulmonary stretch receptor stimulation following pulmonary inflation. PATAKAS et al. [6] fi ...
... Cardiac autonomic nervous system dysregulation is established in COPD patients. Although the cause is still unclear, several factors could be suspected, including hypoxaemia, poor physical fitness and chronic pulmonary stretch receptor stimulation following pulmonary inflation. PATAKAS et al. [6] fi ...
Right Ventricular Function in Inferior Wall
... ventricular involvement in more than 1/3rd of patients with acute inferior wall myocardial infarction. Right ventricle involvement has been reported to be an independent predictor of major complications and in hospital mortality after acute MI [7]. ST segment elevation in right precordial lead, V4R ...
... ventricular involvement in more than 1/3rd of patients with acute inferior wall myocardial infarction. Right ventricle involvement has been reported to be an independent predictor of major complications and in hospital mortality after acute MI [7]. ST segment elevation in right precordial lead, V4R ...
Arrhythmia post heart transplantation
... or loss of SR after HTx can be due to any reason and can lead to serious hemodynamic problems. Ischemia reperfusion injury, unbalanced serum electrolytes and re-warming of cold myocardial tissue are known to initiate arrhythmia during the period of reperfusion after implantation of the heart graft. ...
... or loss of SR after HTx can be due to any reason and can lead to serious hemodynamic problems. Ischemia reperfusion injury, unbalanced serum electrolytes and re-warming of cold myocardial tissue are known to initiate arrhythmia during the period of reperfusion after implantation of the heart graft. ...
Percent ventricular pacing with managed ventricular pacing mode in
... studied. However, it was recently shown that dual-chamber minimal ventricular pacing, when compared with conventional dual-chamber pacing, reduces the absolute risk of persistent atrial fibrillation by 4.8% in patients with SND.15 A second limitation of our study is that we only investigated the effe ...
... studied. However, it was recently shown that dual-chamber minimal ventricular pacing, when compared with conventional dual-chamber pacing, reduces the absolute risk of persistent atrial fibrillation by 4.8% in patients with SND.15 A second limitation of our study is that we only investigated the effe ...
Implantable Cardioverter Defibrillator
... significantly superior outcomes compared to ICD alone for cardiac function, improved clinical condition, fewer hospitalizations, and lower all-cause mortality 12 months or more after implantation, though not during the initial 3-6 months after implantation. However, CRT-D had a significantly higher ...
... significantly superior outcomes compared to ICD alone for cardiac function, improved clinical condition, fewer hospitalizations, and lower all-cause mortality 12 months or more after implantation, though not during the initial 3-6 months after implantation. However, CRT-D had a significantly higher ...
Cardiac Fine Structure in Selected Arthropods and Molluscs
... SYNOPSIS. The ultrastructure of the single-chambered hearts of selected arthropods is compared with that of the multi-chambered hearts of three molluscs. I used the following four systems to make the comparison: (1) contractile apparatus, (2) sarcoplasmic reticulum and surface invaginations, (3) cel ...
... SYNOPSIS. The ultrastructure of the single-chambered hearts of selected arthropods is compared with that of the multi-chambered hearts of three molluscs. I used the following four systems to make the comparison: (1) contractile apparatus, (2) sarcoplasmic reticulum and surface invaginations, (3) cel ...
Pioneer: Robert Anderson, MD, PhD, FRCPath
... Born in Wellington, Shropshire, England, in April 1942, Professor Anderson was educated at the grammar school in the town from 1952 to 1960 before studying medicine, with an intercalated degree in anatomy, at the University of Manchester, England, qualifying BSc in 1963, and MB ChB in 1966. He initi ...
... Born in Wellington, Shropshire, England, in April 1942, Professor Anderson was educated at the grammar school in the town from 1952 to 1960 before studying medicine, with an intercalated degree in anatomy, at the University of Manchester, England, qualifying BSc in 1963, and MB ChB in 1966. He initi ...
full article
... 1999. Two hundred consecutive patients referred for echocardiography to evaluate LV function and consented to be studied were included from a total of 262 patients referred for LV function during this time period. The 62 patients with known LV dysfunction were excluded from analysis. Patients referr ...
... 1999. Two hundred consecutive patients referred for echocardiography to evaluate LV function and consented to be studied were included from a total of 262 patients referred for LV function during this time period. The 62 patients with known LV dysfunction were excluded from analysis. Patients referr ...
Study of coronary sinus and its tributaries in pigs
... in genetics, immunology and biotechnology are large, this possibility is not far. The objective of this work was to make contributions to the vascular study of porcine heart. Methodology: 60 porcine hearts, with an average of five months old and weighing 85-95kg, were obtained from plant Vijagual. A ...
... in genetics, immunology and biotechnology are large, this possibility is not far. The objective of this work was to make contributions to the vascular study of porcine heart. Methodology: 60 porcine hearts, with an average of five months old and weighing 85-95kg, were obtained from plant Vijagual. A ...
Safety of Magnetic Resonance Imaging in Patients
... Despite being significantly smaller and lighter than in the past (forces on older implantable cardioverterdefibrillators were 1 to 5.9 N), new-generation implantable cardioverter-defibrillators are associated with 10 times higher magnetic forces than pacemakers (0.5 to 1.1 N versus 0.05 to 0.12 N, r ...
... Despite being significantly smaller and lighter than in the past (forces on older implantable cardioverterdefibrillators were 1 to 5.9 N), new-generation implantable cardioverter-defibrillators are associated with 10 times higher magnetic forces than pacemakers (0.5 to 1.1 N versus 0.05 to 0.12 N, r ...
Operator: It is now my pleasure to turn today`s program over to Steve
... years and a commitment to heart failure for nearly 25 years, so it brings me much satisfaction to see so many of you engaged with this topic. So I'd like to begin, and I'm happy that now we're up to 375 of you. So I hope that we can all stay engaged throughout the next 30 minutes or so with the inf ...
... years and a commitment to heart failure for nearly 25 years, so it brings me much satisfaction to see so many of you engaged with this topic. So I'd like to begin, and I'm happy that now we're up to 375 of you. So I hope that we can all stay engaged throughout the next 30 minutes or so with the inf ...
Presentation1
... In one form of the disease, the IV septum becomes enlarged and obstructs the blood flow from the left ventricle. the thickened wall sometimes distorts one leaflet of the mitral valve, causing it to leak. HCM is known as hypertrophic obstructive cardiomyopathy (H.O.C.M.) or asymmetric septal hypertro ...
... In one form of the disease, the IV septum becomes enlarged and obstructs the blood flow from the left ventricle. the thickened wall sometimes distorts one leaflet of the mitral valve, causing it to leak. HCM is known as hypertrophic obstructive cardiomyopathy (H.O.C.M.) or asymmetric septal hypertro ...
Updated guidelines on cardiovascular evaluation before noncardiac
... patients who have asymptomatic severe aortic or mitral regurgitation or aortic stenosis. Surgery may also be reasonable in patients with asymptomatic severe mitral stenosis who are not candidates for repair. Arrhythmias Cardiac arrhythmias and conduction defects are often seen in the perioperative p ...
... patients who have asymptomatic severe aortic or mitral regurgitation or aortic stenosis. Surgery may also be reasonable in patients with asymptomatic severe mitral stenosis who are not candidates for repair. Arrhythmias Cardiac arrhythmias and conduction defects are often seen in the perioperative p ...
L3-IHD,angina, MI 2..
... myocardial infarction. C. Massive plaque rupture with superimposed thrombus, also triggering a fatal myocardial infarction (special stain highlighting ...
... myocardial infarction. C. Massive plaque rupture with superimposed thrombus, also triggering a fatal myocardial infarction (special stain highlighting ...
Interaction between cardiac sympathetic drive and heart rate in heart
... deletion polymorphism according to previously published methods (11,13–15). In brief, for the determination of the 1-adrenoceptor genotype at position 49 a 794-bp fragment (positions 1–794) of the 1-adrenoceptor gene was amplified by PCR using the following primers: 5=-ATG GGC GGG GTG GTC-3= (sens ...
... deletion polymorphism according to previously published methods (11,13–15). In brief, for the determination of the 1-adrenoceptor genotype at position 49 a 794-bp fragment (positions 1–794) of the 1-adrenoceptor gene was amplified by PCR using the following primers: 5=-ATG GGC GGG GTG GTC-3= (sens ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.