Tachyarrhythmias
... creating physiologic “interference” and block. Under the right conditions, some anterograde impulses may slip through. This phenomenon is not equivalent to third degree AV block ...
... creating physiologic “interference” and block. Under the right conditions, some anterograde impulses may slip through. This phenomenon is not equivalent to third degree AV block ...
THE ROLE OF MAGNESIUM IN CARDIAC ARRHYTHMIAS
... According to Nair and Morillo, both meta-analyzes show that magnesium does not have advantage over conventional atrioventricular node blockers (calcium antagonists, beta-blockers) and antiarrhythmic agents (amiodaron, class I drugs). However, magnesium is better than placebo, particularly in combina ...
... According to Nair and Morillo, both meta-analyzes show that magnesium does not have advantage over conventional atrioventricular node blockers (calcium antagonists, beta-blockers) and antiarrhythmic agents (amiodaron, class I drugs). However, magnesium is better than placebo, particularly in combina ...
pacemaker and iCd insertion procedure
... The site is numbed with local anaesthetic a device inserted. They include local tissue and the cardiologist will make a small infection, formation of blood clots, damage incision into the skin on the front of the to the heart wall with bleeding around the chest wall just below the collarbone. The he ...
... The site is numbed with local anaesthetic a device inserted. They include local tissue and the cardiologist will make a small infection, formation of blood clots, damage incision into the skin on the front of the to the heart wall with bleeding around the chest wall just below the collarbone. The he ...
A ngiographic Study of Normal Coronary A rteries as First
... The heart is an aerobic organ depending almost on the oxidation of substrates for the generation of energy. At rest the heart receives five percent of the cardiac output (250 ml /min) consequently the coronary blood flow must be coupled to compensate the energy demand . When oxygen demand increases ...
... The heart is an aerobic organ depending almost on the oxidation of substrates for the generation of energy. At rest the heart receives five percent of the cardiac output (250 ml /min) consequently the coronary blood flow must be coupled to compensate the energy demand . When oxygen demand increases ...
- Wiley Online Library
... In 1 study, myocardial aldosterone concentration was increased 4.5-fold in human patients with HCM, but plasma aldosterone concentration remained normal.11 Approximately 50% of Maine Coon cats with mild to severe familial HCM without heart failure have abnormally high plasma aldosterone concentratio ...
... In 1 study, myocardial aldosterone concentration was increased 4.5-fold in human patients with HCM, but plasma aldosterone concentration remained normal.11 Approximately 50% of Maine Coon cats with mild to severe familial HCM without heart failure have abnormally high plasma aldosterone concentratio ...
CD36 Mediates the Cardiovascular Action of Growth Hormone
... Recombinant Soluble CD36 Expression, Photolabeling, and Immunoprecipitation Extracellular (152 to 1389) CD36 cDNA was cloned by reverse transcription of rat heart ventricle followed by PCR amplification of the cDNA by using AvanTaq DNA polymerase (Clonetech). Oligonucleotide primers were designed ag ...
... Recombinant Soluble CD36 Expression, Photolabeling, and Immunoprecipitation Extracellular (152 to 1389) CD36 cDNA was cloned by reverse transcription of rat heart ventricle followed by PCR amplification of the cDNA by using AvanTaq DNA polymerase (Clonetech). Oligonucleotide primers were designed ag ...
Print - Circulation Research
... Muscholl2 on isolated, perfused rabbit hearts demonstrated that an infusion of acetylcholine caused a reduction in the quantity of NE released in response to a given stimulus to the cardiac sympathetic nerves. In a subsequent study on isolated rabbit atria, these investigators3 showed that the quant ...
... Muscholl2 on isolated, perfused rabbit hearts demonstrated that an infusion of acetylcholine caused a reduction in the quantity of NE released in response to a given stimulus to the cardiac sympathetic nerves. In a subsequent study on isolated rabbit atria, these investigators3 showed that the quant ...
The Language of Medicine
... P wave = spread of excitation wave over the atria just before contraction; QRS wave = spread of excitation wave over the ventricles as the ventricles contract; T wave = electrical recovery and relaxation of ventricles. A heart attack (myocardial infarction or MI) can be recognized by an elevation in ...
... P wave = spread of excitation wave over the atria just before contraction; QRS wave = spread of excitation wave over the ventricles as the ventricles contract; T wave = electrical recovery and relaxation of ventricles. A heart attack (myocardial infarction or MI) can be recognized by an elevation in ...
The evolutionary origin of cardiac chambers - IB-USP
... Fig. 2. (A) S-shaped, vertebrate heart. Inflow chambers are dorsal, outflow chambers, ventral. Red arrows indicate flow direction (Kardong, 2002; Kilner et al., 2000). (B) In amphibians and amniotes, atrium and sinus venosus (SV) are displaced rostrally (green arrow), obscuring the original dorso/ve ...
... Fig. 2. (A) S-shaped, vertebrate heart. Inflow chambers are dorsal, outflow chambers, ventral. Red arrows indicate flow direction (Kardong, 2002; Kilner et al., 2000). (B) In amphibians and amniotes, atrium and sinus venosus (SV) are displaced rostrally (green arrow), obscuring the original dorso/ve ...
Pacing Lead Perforation on the Right Side of the Heart
... ardiac perforation is a rare potentially serious and often unrecognized complication of pacemaker lead implantation. It may occur at the time of implantation when it may cause hypotension from cardiac tamponade. Perforation usually does not lead to tamponade if the lead is withdrawn and repositioned ...
... ardiac perforation is a rare potentially serious and often unrecognized complication of pacemaker lead implantation. It may occur at the time of implantation when it may cause hypotension from cardiac tamponade. Perforation usually does not lead to tamponade if the lead is withdrawn and repositioned ...
Impaired left ventricular relaxation in hypertrophic
... dependent, although if deactivation is grossly depressed, relaxation may become load independent (3,4) . Thus, in the absence of mitral stenosis, the major determinant of peak early mitral inflow velocity is the left atrial-left ventricular pressure difference in early diastole (8) . In addition to ...
... dependent, although if deactivation is grossly depressed, relaxation may become load independent (3,4) . Thus, in the absence of mitral stenosis, the major determinant of peak early mitral inflow velocity is the left atrial-left ventricular pressure difference in early diastole (8) . In addition to ...
Life After a Heart Attack
... throughout the province that your family doctor can put you in touch with. The diabetes education centre can offer you education and work with you and your family doctor to manage your diabetes. Control high blood cholesterol You may have been told that your cholesterol level was normal. Now that yo ...
... throughout the province that your family doctor can put you in touch with. The diabetes education centre can offer you education and work with you and your family doctor to manage your diabetes. Control high blood cholesterol You may have been told that your cholesterol level was normal. Now that yo ...
U.S. Hospital Use of Echocardiography
... specific all-cause hospital mortality. The dataset was first confined to admission diagnoses associated with the greatest proportion of echo use (representing one-half of all estimated inpatient echo studies in ...
... specific all-cause hospital mortality. The dataset was first confined to admission diagnoses associated with the greatest proportion of echo use (representing one-half of all estimated inpatient echo studies in ...
Buffered Mag Glycinate w L-Taurine
... Matrix Nutritionals Series was designed as an eclectic offering for the Physica Energetics line of remedies primarily to assist in the “reactivation of the mesenchyme” (Dr. Reinhold Voll), via the nutritional complement pathways. These pathways are present in every system throughout the body and req ...
... Matrix Nutritionals Series was designed as an eclectic offering for the Physica Energetics line of remedies primarily to assist in the “reactivation of the mesenchyme” (Dr. Reinhold Voll), via the nutritional complement pathways. These pathways are present in every system throughout the body and req ...
Bilateral Pleural Effusions: a rare presentation of Constrictive P
... Constrictive Pericarditis is a rare disease that can be a challenge to diagnose unless a high index of suspicion is maintained.1 Classically it presents with symptoms of heart failure and as pericardial thickening or calcification on imaging studies. However, initial diagnostic studies remain non-sp ...
... Constrictive Pericarditis is a rare disease that can be a challenge to diagnose unless a high index of suspicion is maintained.1 Classically it presents with symptoms of heart failure and as pericardial thickening or calcification on imaging studies. However, initial diagnostic studies remain non-sp ...
THE UTILITY OF PULSE PRESSURE MEASURED BY RADIAL
... this must be considered when we compare the two measures. PPb is associated with increased left ventricular mass18. This may be due to the fact that higher pulse pressures in the proximal arterial tree places increased workload on the heart. The heart muscle hypertrophies to compensate for this incr ...
... this must be considered when we compare the two measures. PPb is associated with increased left ventricular mass18. This may be due to the fact that higher pulse pressures in the proximal arterial tree places increased workload on the heart. The heart muscle hypertrophies to compensate for this incr ...
Cardiac Volume in Normal Children and Adolescents
... This group included six males and six females (fig. 5). Characteristic of this group was the normal cardiac volume except for one patient whose heart volume was 6% above the largest value predicted by weight and who had had several attacks of carditis. Cardiac volume during the acute phase of rheuma ...
... This group included six males and six females (fig. 5). Characteristic of this group was the normal cardiac volume except for one patient whose heart volume was 6% above the largest value predicted by weight and who had had several attacks of carditis. Cardiac volume during the acute phase of rheuma ...
Acute Exacerbation Impairs Right Ventricular Function in COPD
... disease (COPD) is a multicomponent disease characterized by an inflammatory response of the lungs to noxious particles, and extrapulmonary effects, including cardiovascular system abnormalities, that contribute to disease severity.1-4 COPD exacerbations are considered to be the key drivers of morbid ...
... disease (COPD) is a multicomponent disease characterized by an inflammatory response of the lungs to noxious particles, and extrapulmonary effects, including cardiovascular system abnormalities, that contribute to disease severity.1-4 COPD exacerbations are considered to be the key drivers of morbid ...
VHD Guidelines Review
... Nishimura RA, Otto CM, Bonow RO, et al. 2014 AHA/ACC Guideline for the Management of Patients With Valvular Heart Disease: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol 2014;63:e57-185. ...
... Nishimura RA, Otto CM, Bonow RO, et al. 2014 AHA/ACC Guideline for the Management of Patients With Valvular Heart Disease: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol 2014;63:e57-185. ...
Dynamic myocardial contractile parameters from left - AJP
... contraction, length-tension and force-velocity, are actually special cases with respect to contraction time and load, i.e., peak force during isometric contraction in the case of length-tension and initial shortening velocity against isotonic load in the case of force-velocity. These descriptors are ...
... contraction, length-tension and force-velocity, are actually special cases with respect to contraction time and load, i.e., peak force during isometric contraction in the case of length-tension and initial shortening velocity against isotonic load in the case of force-velocity. These descriptors are ...
Cardiac Arrhythmias
... 101–160 beats/min. Young, healthy adults can accelerate their heart rate up to 180–200 beats/min, particularly during exercise. Young children have been noted to have sinus rates up to 220 beats/min. Sinus tachycardia should not be viewed as a primary arrhythmia but more as a response to an underlyi ...
... 101–160 beats/min. Young, healthy adults can accelerate their heart rate up to 180–200 beats/min, particularly during exercise. Young children have been noted to have sinus rates up to 220 beats/min. Sinus tachycardia should not be viewed as a primary arrhythmia but more as a response to an underlyi ...
Aerobic Exercise Training Promotes Physiological Cardiac
... exercise training (20, 21, 24, 65, 89, 91) and confirmed by Ma et al. (58) and Martinelli et al. ...
... exercise training (20, 21, 24, 65, 89, 91) and confirmed by Ma et al. (58) and Martinelli et al. ...
Age as a Risk Factor for Stroke in Atrial Fibrillation Patients
... guidelines proposed the use of the CHA2DS2-VASc [cardiac failure, hypertension, age≥75 years(doubled), diabetes, stroke (doubled)vascular disease, age 65-74 and sex category (female)] score for risk stratification of patients with AF.3 In the CHA2DS2-VASc score, age 65-74 adds one point in the score ...
... guidelines proposed the use of the CHA2DS2-VASc [cardiac failure, hypertension, age≥75 years(doubled), diabetes, stroke (doubled)vascular disease, age 65-74 and sex category (female)] score for risk stratification of patients with AF.3 In the CHA2DS2-VASc score, age 65-74 adds one point in the score ...
Obstructive Sleep Apnea
... sympathetic activity, endothelium, inflammation, and continuous positive airway pressure (CPAP) to identify peer-reviewed studies of OSA. Priority was given to large prospective cohort studies and to randomized controlled trials. Data Extraction We identified 154 original investigations and reviews ...
... sympathetic activity, endothelium, inflammation, and continuous positive airway pressure (CPAP) to identify peer-reviewed studies of OSA. Priority was given to large prospective cohort studies and to randomized controlled trials. Data Extraction We identified 154 original investigations and reviews ...
Atorvastatin inhibits cardiac hypertrophy of rats in vitro and in vivo
... worldwide. It represents a compensatory response to mechanical pressure overload and the change in neurohormoral factors and is observed in various cardiovascular diseases such as hypertension, myocardial infarction and valvular heart disease. Clinical studies have demonstrated that cardiac hypertro ...
... worldwide. It represents a compensatory response to mechanical pressure overload and the change in neurohormoral factors and is observed in various cardiovascular diseases such as hypertension, myocardial infarction and valvular heart disease. Clinical studies have demonstrated that cardiac hypertro ...
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.