Response of recurrent sustained ventricular tachycardia to verapamil
... The tachycardia in our patient fulfils all the generally accepted criteria of ventricular tachycardia.3 An We thank Professor Nissim Kauli, Kaplan Hospital, additional useful diagnostic clue is the failure of Rehovot, for referring this patient to our department. adenosine triphosphate to alter the ...
... The tachycardia in our patient fulfils all the generally accepted criteria of ventricular tachycardia.3 An We thank Professor Nissim Kauli, Kaplan Hospital, additional useful diagnostic clue is the failure of Rehovot, for referring this patient to our department. adenosine triphosphate to alter the ...
BE III PG 1-5
... The first step is to evaluate the P waves. P waves indicate whether the atrial rhythm is normal. For proper diagnosis of an ECG, technicians should ask themselves the following questions: Are the P waves occurring at regular intervals? Do the P waves all have the same appearance on the ECG? Are the ...
... The first step is to evaluate the P waves. P waves indicate whether the atrial rhythm is normal. For proper diagnosis of an ECG, technicians should ask themselves the following questions: Are the P waves occurring at regular intervals? Do the P waves all have the same appearance on the ECG? Are the ...
1-s2.0-S0167527315007883-main - Discovery
... (LDH) are activated to regulate SUR2A [3]. Whether high altitudehypoxia would regulate SUR2A levels and what the underlying mechanism would be is yet unknown. Normobaric 13% oxygen corresponds to oxygen tension at ~3600 m above sea level. 24 h-long general exposure of mice to 13% oxygen decreased PO ...
... (LDH) are activated to regulate SUR2A [3]. Whether high altitudehypoxia would regulate SUR2A levels and what the underlying mechanism would be is yet unknown. Normobaric 13% oxygen corresponds to oxygen tension at ~3600 m above sea level. 24 h-long general exposure of mice to 13% oxygen decreased PO ...
Bradycardia-dependent triggered activity: relevance
... rules by which arrhythmias due to delayed afterdepolarizations in patients could be detected. 4 Observations on delayed afterdepolarizations induced by cardiac glycosides in voltage-clamp experiments provided evidence for a transient mixed inward current due to an increase in membrane permeability m ...
... rules by which arrhythmias due to delayed afterdepolarizations in patients could be detected. 4 Observations on delayed afterdepolarizations induced by cardiac glycosides in voltage-clamp experiments provided evidence for a transient mixed inward current due to an increase in membrane permeability m ...
Adrenergic and Muscarinic Receptors in the Human Heart
... 1992b; Fig. 2). In a direct comparative study, the human right and left ventricles had the smallest a1-adrenoceptor density among seven species, including rat, guinea pig, mouse, rabbit, pig, and calf; in contrast, rats had the highest cardiac a1-adrenoceptor density, which exceeded that of all othe ...
... 1992b; Fig. 2). In a direct comparative study, the human right and left ventricles had the smallest a1-adrenoceptor density among seven species, including rat, guinea pig, mouse, rabbit, pig, and calf; in contrast, rats had the highest cardiac a1-adrenoceptor density, which exceeded that of all othe ...
short communication heart rate and gas exchange in freely diving
... (Figs 1,2). Interestingly, while eating, when ventilation was presumably less regular and interrupted periodically by swallowing, heart rate was more variable, between 200 and 350beatsmin" 1 (Fig. 1). The mink were sometimes observed to exhale while underwater at the start of deep dives and it is no ...
... (Figs 1,2). Interestingly, while eating, when ventilation was presumably less regular and interrupted periodically by swallowing, heart rate was more variable, between 200 and 350beatsmin" 1 (Fig. 1). The mink were sometimes observed to exhale while underwater at the start of deep dives and it is no ...
CCS Consensus Cover.qxd
... There are two accepted general strategies for arrhythmia management in AF. The first is to control the heart rate without any specific attempt to restore and maintain sinus rhythm (The Rate Control Strategy). The second is to restore and attempt to maintain sinus rhythm, including repeated cardiover ...
... There are two accepted general strategies for arrhythmia management in AF. The first is to control the heart rate without any specific attempt to restore and maintain sinus rhythm (The Rate Control Strategy). The second is to restore and attempt to maintain sinus rhythm, including repeated cardiover ...
19 Congenital Heart Disease in Children and Adults
... syndromes, of which congenital cardiac malformations play an important part. Trisomy 21 (Down’s syndrome) and Turner’s syndrome (XO) are classic examples. Other important syndromes include Edwards’ syndrome (trisomy 18) and Patau’s syndrome (trisomy 13). In several other syndromes associated with co ...
... syndromes, of which congenital cardiac malformations play an important part. Trisomy 21 (Down’s syndrome) and Turner’s syndrome (XO) are classic examples. Other important syndromes include Edwards’ syndrome (trisomy 18) and Patau’s syndrome (trisomy 13). In several other syndromes associated with co ...
Measurement of cardiac output during exercise in patients with
... In the Netherlands the number of patients with chronic heart failure (CHF) is about 200.000, which is 1%-2% of the population. [1] Chronic heart failure can be defined as a decreased function of the heart as a pump and can have several pathophysiological causes. In normal conditions a balance consis ...
... In the Netherlands the number of patients with chronic heart failure (CHF) is about 200.000, which is 1%-2% of the population. [1] Chronic heart failure can be defined as a decreased function of the heart as a pump and can have several pathophysiological causes. In normal conditions a balance consis ...
The Cardiac Conduction System
... tory period. Normal conduction during sinus rhythm occurs along the fast pathway, but high heart rates or premature beats often conduct through the slow pathway because the fast pathway may be refractory at these rates. In general, the atrioventricular node is located in the so-called floor of the r ...
... tory period. Normal conduction during sinus rhythm occurs along the fast pathway, but high heart rates or premature beats often conduct through the slow pathway because the fast pathway may be refractory at these rates. In general, the atrioventricular node is located in the so-called floor of the r ...
BAYLOR HEART AND VASCULAR SERVICES AT DALLAS
... Over the course of the past year, the health care environment has become increasingly complex and in many ways, more challenging. However, it was in the face of these challenges that our team showed their true character. Guided by our founding principles of compassion, honesty, transparency, and pat ...
... Over the course of the past year, the health care environment has become increasingly complex and in many ways, more challenging. However, it was in the face of these challenges that our team showed their true character. Guided by our founding principles of compassion, honesty, transparency, and pat ...
primary function of cardiac output and systemic vascular resistance
... Definition: the force exerted by the blood against the walls of the bleed vessels Adequate to maintain tissue perfusion during ...
... Definition: the force exerted by the blood against the walls of the bleed vessels Adequate to maintain tissue perfusion during ...
General Questions about AEDs 1. What does AED stand for? AED
... Survival. They can restore a normal heart rhythm in victims of sudden cardiac arrest. New, portable AEDs enable more people to respond to a medical emergency that requires defibrillation. When a person suffers a sudden cardiac arrest, their chance of survival decreases by 7% to 10% for each minut ...
... Survival. They can restore a normal heart rhythm in victims of sudden cardiac arrest. New, portable AEDs enable more people to respond to a medical emergency that requires defibrillation. When a person suffers a sudden cardiac arrest, their chance of survival decreases by 7% to 10% for each minut ...
mechanisms of cardiac septation and valve development
... develop into atrioventricular (mitral and tricuspid) valves, whereas the OFT endocardial cushions give rise to semilunar (aortic and pulmonic) valves (Fig. 1). The formation of heart valves ensures that blood flows in one direction from the atria to ventricles and then to the arteries. Multiple cell ...
... develop into atrioventricular (mitral and tricuspid) valves, whereas the OFT endocardial cushions give rise to semilunar (aortic and pulmonic) valves (Fig. 1). The formation of heart valves ensures that blood flows in one direction from the atria to ventricles and then to the arteries. Multiple cell ...
Case 5 - Scand
... as fundamental differences in the intestinal anatomy and flora between humans and rabbits may cause major limitations in the testing of certain antibiotics ...
... as fundamental differences in the intestinal anatomy and flora between humans and rabbits may cause major limitations in the testing of certain antibiotics ...
Right ventricular reserve in a piglet model of chronic pulmonary hypertension
... Survival in patients with pulmonary hypertension (PH) is closely related to right ventricular (RV) function [1–3]. In haemodynamics-based studies, low cardiac index (CI) and increased right atrial pressure (RAP) at rest are strong predictors of outcome [4]. While the majority of studies have focused ...
... Survival in patients with pulmonary hypertension (PH) is closely related to right ventricular (RV) function [1–3]. In haemodynamics-based studies, low cardiac index (CI) and increased right atrial pressure (RAP) at rest are strong predictors of outcome [4]. While the majority of studies have focused ...
DIFFERENTIAL DIAGNOSIS AND TREATMENT EDEMA.TACTICS GP.
... 6. Violation of lymph drainage. Causes of edema syndrome Chronic heart failure Heart failure - a pathological condition in which the cardiac output does not match the needs of the body by reducing the pumping function of the heart.Symptoms of heart failure:Causes of Heart Failure:The cause may be an ...
... 6. Violation of lymph drainage. Causes of edema syndrome Chronic heart failure Heart failure - a pathological condition in which the cardiac output does not match the needs of the body by reducing the pumping function of the heart.Symptoms of heart failure:Causes of Heart Failure:The cause may be an ...
Factors Associated with Ischemic Stroke on Therapeutic
... Purpose: In this study, we investigated the stroke mechanism and the factors associated with ischemic stroke in patients with nonvalvular atrial fibrillation (NVAF) who were on optimal oral anticoagulation with warfarin. Materials and Methods: This was a multicenter case-control study. The cases wer ...
... Purpose: In this study, we investigated the stroke mechanism and the factors associated with ischemic stroke in patients with nonvalvular atrial fibrillation (NVAF) who were on optimal oral anticoagulation with warfarin. Materials and Methods: This was a multicenter case-control study. The cases wer ...
3 SHOCK Management of Shock James W. Holcroft,
... Any clinical condition that is associated with ischemia-reperfusion or infection can cause inflammatory shock (which is sometimes called septic shock if caused by an infection). Clinical conditions capable of causing inflammatory shock include pneumonia, peritonitis, cholangitis, pyelonephritis, sof ...
... Any clinical condition that is associated with ischemia-reperfusion or infection can cause inflammatory shock (which is sometimes called septic shock if caused by an infection). Clinical conditions capable of causing inflammatory shock include pneumonia, peritonitis, cholangitis, pyelonephritis, sof ...
Three-dimensional residual strain in midanterior canine left ventricle
... mounted on a light microscope (Nikon, Optiphot-2), lowpower (320) images of the serial tissue sections were acquired onto a microcomputer (Apple, Macintosh Quadra 900) using NIH Image software. At each transmural depth, the mean fiber angle was obtained from at least five measurements in each image. ...
... mounted on a light microscope (Nikon, Optiphot-2), lowpower (320) images of the serial tissue sections were acquired onto a microcomputer (Apple, Macintosh Quadra 900) using NIH Image software. At each transmural depth, the mean fiber angle was obtained from at least five measurements in each image. ...
The Role Of Renin Angiotensin System In Atrial Fibrillation
... in the regulation of multiple cardiovascular, pulmonary and renal processes in humans.22 Systemic hypertension and heart failure are the most important risk factors associated with the development of AF.3,6,23,24 The activation of RAS plays an integral part in the neurohumoral processes leading to c ...
... in the regulation of multiple cardiovascular, pulmonary and renal processes in humans.22 Systemic hypertension and heart failure are the most important risk factors associated with the development of AF.3,6,23,24 The activation of RAS plays an integral part in the neurohumoral processes leading to c ...
Evaluation of Cardiothoracic Ratio of Normal Subjects
... The cardiothoracic ratio (CTR) is the ratio of the cardiac diameter (CD) to the thoracic diameter (TD) . It is a useful screening method to detect cardiomegaly. The importance of this study is to estimate the CTR among healthy population in order to establish a constant range or value which could be ...
... The cardiothoracic ratio (CTR) is the ratio of the cardiac diameter (CD) to the thoracic diameter (TD) . It is a useful screening method to detect cardiomegaly. The importance of this study is to estimate the CTR among healthy population in order to establish a constant range or value which could be ...
Sudden cardiac death in young Danes
... and degrees of SIDS depending on autopsy results and risk factors prior to death. This classification system, however, is difficult to apply on a retrospective analysis of SIDS, but may be helpful in prospective studies. 1.2 EPIDEMIOLOGY OF SUDDEN CARDIAC DEATH IN THE YOUNG Sudden cardiac death (SCD ...
... and degrees of SIDS depending on autopsy results and risk factors prior to death. This classification system, however, is difficult to apply on a retrospective analysis of SIDS, but may be helpful in prospective studies. 1.2 EPIDEMIOLOGY OF SUDDEN CARDIAC DEATH IN THE YOUNG Sudden cardiac death (SCD ...
Independence of Myocardial Oxygen Consumption from Pressure
... pump, and the potential energy is the remaining part unused for the pumping. The P-V trajectory during diastole divides PVA into these two parts. The potential energy will be eventually converted to heat unless it is further converted to an additional external mechanical work by afterload reduction ...
... pump, and the potential energy is the remaining part unused for the pumping. The P-V trajectory during diastole divides PVA into these two parts. The potential energy will be eventually converted to heat unless it is further converted to an additional external mechanical work by afterload reduction ...
Use of quinine and mortality-risk in patients with heart failure—a
... if they had a discharge diagnosis available within a 10-year period prior to actual observational time, meaning that comorbidities were updated continuously. The diagnosis of diabetes was obtained from claimed prescriptions for glucose-lowering medications (anatomical therapeutic classification [ATC] ...
... if they had a discharge diagnosis available within a 10-year period prior to actual observational time, meaning that comorbidities were updated continuously. The diagnosis of diabetes was obtained from claimed prescriptions for glucose-lowering medications (anatomical therapeutic classification [ATC] ...
Myocardial infarction
Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, occurs when blood flow stops to a part of the heart causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Often it is in the center or left side of the chest and lasts for more than a few minutes. The discomfort may occasionally feel like heartburn. Other symptoms may include shortness of breath, nausea, feeling faint, a cold sweat, or feeling tired. About 30% of people have atypical symptoms, with women more likely than men to present atypically. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an irregular heartbeat, or cardiac arrest.Most MIs occur due to coronary artery disease. Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol intake, among others. The mechanism of an MI often involves the rupture of an atherosclerotic plaque, leading to complete blockage of a coronary artery. MIs are less commonly caused by coronary artery spasms, which may be due to cocaine, significant emotional stress, and extreme cold, among others. A number of tests are useful to help with diagnosis, including electrocardiograms (ECGs), blood tests, and coronary angiography. An ECG may confirm an ST elevation MI if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB.Aspirin is an appropriate immediate treatment for a suspected MI. Nitroglycerin or opioids may be used to help with chest pain; however, they do not improve overall outcomes. Supplemental oxygen should be used in those with low oxygen levels or shortness of breath. In ST elevation MIs treatments which attempt to restore blood flow to the heart are typically recommended and include angioplasty, where the arteries are pushed open, or thrombolysis, where the blockage is removed using medications. People who have a non-ST elevation myocardial infarction (NSTEMI) are often managed with the blood thinner heparin, with the additional use angioplasty in those at high risk. In people with blockages of multiple coronary arteries and diabetes, bypass surgery (CABG) may be recommended rather than angioplasty. After an MI, lifestyle modifications, along with long term treatment with aspirin, beta blockers, and statins, are typically recommended.Worldwide, more than 3 million people have ST elevation MIs and 4 million have NSTEMIs each year. STEMIs occur about twice as often in men as women. About one million people have an MI each year in the United States. In the developed world the risk of death in those who have had an STEMI is about 10%. Rates of MI for a given age have decreased globally between 1990 and 2010.