- Journal of Pharmacognosy and Phytochemistry
... Two additional rat hearts were also treated with blue cohosh, but their baseline heart rates were only ~7 beats/15 seconds, or 28 beats/min. Since this was remarkably slower than the other three treatment hearts, and since both of them completely stopped beating after 7.5 min, they were left out of ...
... Two additional rat hearts were also treated with blue cohosh, but their baseline heart rates were only ~7 beats/15 seconds, or 28 beats/min. Since this was remarkably slower than the other three treatment hearts, and since both of them completely stopped beating after 7.5 min, they were left out of ...
Autonomic Nervous System Interaction With the
... (HR) response to exercise (reserve), HR recovery after exercise, and multiple components of HR variability both at rest and with exercise. Poor HR response to exercise has been strongly associated with sudden cardiac death and HR recovery from a standard exercise test has been shown to be predictive ...
... (HR) response to exercise (reserve), HR recovery after exercise, and multiple components of HR variability both at rest and with exercise. Poor HR response to exercise has been strongly associated with sudden cardiac death and HR recovery from a standard exercise test has been shown to be predictive ...
Modelling fibre orientation of the left ventricular human heart wall
... serve their purpose of producing force and causing motion [6] through contraction and relaxation. Note that the fibres themselves cannot stretch back out — collagen tissue makes this possible. There are three types of muscles: skeletal, cardiac and smooth. This thesis focuses on cardiac muscle fibre ...
... serve their purpose of producing force and causing motion [6] through contraction and relaxation. Note that the fibres themselves cannot stretch back out — collagen tissue makes this possible. There are three types of muscles: skeletal, cardiac and smooth. This thesis focuses on cardiac muscle fibre ...
European Heart Rhythm Association/Heart Failure Association joint
... The two constantly growing global health problems (that is, HF and AF) often co-exist, or may precipitate one another. Recent registry-based reports show that 40% of patients hospitalized for HF already have a history of AF, up to 50% of patients have AF at baseline, and nearly 20% of patients may ...
... The two constantly growing global health problems (that is, HF and AF) often co-exist, or may precipitate one another. Recent registry-based reports show that 40% of patients hospitalized for HF already have a history of AF, up to 50% of patients have AF at baseline, and nearly 20% of patients may ...
Effect of Endurance Exercise on Autonomic Control of Heart Rate
... in sympathetic activity. An increase in baroreceptor impulse frequency inhibits vasoconstrictor action and results in blood vessel vasodilation and a subsequent reduction in blood pressure. Reflex activity from contracting muscle is also activated intramuscularly by mechanoreceptor stimulation (stre ...
... in sympathetic activity. An increase in baroreceptor impulse frequency inhibits vasoconstrictor action and results in blood vessel vasodilation and a subsequent reduction in blood pressure. Reflex activity from contracting muscle is also activated intramuscularly by mechanoreceptor stimulation (stre ...
The effects of daily exercise on susceptibility to sudden
... 50 mm Hg. RR interval (and heart rate) were plotted against the preceding systolic arterial pressure and the slope was determined by least-squares fit linear regression (an index of baroreceptor reflex sensitivity). The heart rate change for a 30 mm Hg increase in arterial blood pressure was determi ...
... 50 mm Hg. RR interval (and heart rate) were plotted against the preceding systolic arterial pressure and the slope was determined by least-squares fit linear regression (an index of baroreceptor reflex sensitivity). The heart rate change for a 30 mm Hg increase in arterial blood pressure was determi ...
Heart Failure
... have been nothing short of spectacular. Age-adjusted CVDrelated deaths have declined by about two-thirds in industrialized nations (1). Mortality rates associated with the acute coronary syndromes (ACS), valvular and congenital heart disease, uncontrolled hypertension, and many arrhythmias all have ...
... have been nothing short of spectacular. Age-adjusted CVDrelated deaths have declined by about two-thirds in industrialized nations (1). Mortality rates associated with the acute coronary syndromes (ACS), valvular and congenital heart disease, uncontrolled hypertension, and many arrhythmias all have ...
molecular cloning and reduced expression in experimental heart
... both groups, ANP release after LA stretch was significantly reduced in animals with shunt. Because the pressure was subphysiological at baseline compared with intact animals and thereby the stimulus for ANP release was minimal under these conditions, we assumed that the pro-ANP-converting ability of ...
... both groups, ANP release after LA stretch was significantly reduced in animals with shunt. Because the pressure was subphysiological at baseline compared with intact animals and thereby the stimulus for ANP release was minimal under these conditions, we assumed that the pro-ANP-converting ability of ...
Evolution of Paroxysmal Atrial Fibrillation to Persistent or Permanent
... Journal of Atrial Fibrillation modifying the atrial substrate.29-31 Hirayama et al have shown that ACE inhibitors are effective in preventing AF progression.32 In our study that mostly consisted of a Caucasian American population, ACE inhibitors/ARBs failed to show this effect. Our study also faile ...
... Journal of Atrial Fibrillation modifying the atrial substrate.29-31 Hirayama et al have shown that ACE inhibitors are effective in preventing AF progression.32 In our study that mostly consisted of a Caucasian American population, ACE inhibitors/ARBs failed to show this effect. Our study also faile ...
Cardiopulmonary Exercise Testing Variables
... systolic volume, (5) peak oxygen uptake ( V̇O2), (6) ventilatory efficiency, (7) the partial pressure of end-tidal carbon dioxide (PET CO2) at rest and peak exercise, and (8) heart rate recovery at 1 minute (HRR1). ■ RESULTS: Pearson correlation revealed that E/E was significantly correlated with p ...
... systolic volume, (5) peak oxygen uptake ( V̇O2), (6) ventilatory efficiency, (7) the partial pressure of end-tidal carbon dioxide (PET CO2) at rest and peak exercise, and (8) heart rate recovery at 1 minute (HRR1). ■ RESULTS: Pearson correlation revealed that E/E was significantly correlated with p ...
BUSTING THROUGH THE 5 MYTHS ABOUT SUDDEN CARDIAC
... Caused by an occlusion (blockage) in an artery that supplies blood to the heart (coronary artery). The affected heart muscle then begins to die due to lack of oxygen. ...
... Caused by an occlusion (blockage) in an artery that supplies blood to the heart (coronary artery). The affected heart muscle then begins to die due to lack of oxygen. ...
Volume 7, Issue 2, March-April 2016, pp. 60–70, Article ID:... Available online at
... contains 48 recordings with each record containing 30 minutes ECG lead signal sampled at 360 Hz with 11 bit resolution. These 48 recordings cover all 16 different types of heart beats including Normal beat. In this paper a total of 20 ECG records are ...
... contains 48 recordings with each record containing 30 minutes ECG lead signal sampled at 360 Hz with 11 bit resolution. These 48 recordings cover all 16 different types of heart beats including Normal beat. In this paper a total of 20 ECG records are ...
CHANGES IN AUTONOMIC TONE RESULTING FROM CIRCUMFERENTIAL PULMONARY VEIN ISOLATION by GEOFFREY SEABORN
... cardioversion involves timed applications of DC shock, while pharmaceutical cardioversion is performed by modifying the properties of the electrical conduction system of the heart using specialized medications such as Amidoarone, Proafenone, or Dronedarone. If both rate control medication and cardio ...
... cardioversion involves timed applications of DC shock, while pharmaceutical cardioversion is performed by modifying the properties of the electrical conduction system of the heart using specialized medications such as Amidoarone, Proafenone, or Dronedarone. If both rate control medication and cardio ...
Management of atrial fibrillation in patients with heart failure
... on total or cardiovascular mortality in this subgroup.47 Similarly, a post hoc analysis of the CIBIS-II study showed that bisoprolol had no effect on mortality in patients with heart failure NYHA classes III–IV, an EF 35%, and AF.48 The authors speculated that the smaller reduction of heart rate b ...
... on total or cardiovascular mortality in this subgroup.47 Similarly, a post hoc analysis of the CIBIS-II study showed that bisoprolol had no effect on mortality in patients with heart failure NYHA classes III–IV, an EF 35%, and AF.48 The authors speculated that the smaller reduction of heart rate b ...
Relation between QT duration and maximal wall thickness in familial
... QT duration and myocardial hypertrophy In penetrant subjects, and despite a smaller maximum wall thickness, patients with a mutation on the MyBPC gene had a longer Qtcmax than those with a mutation on the β-MHC gene. Mutations in the MyBPC or β-MHC genes showed different patterns with respect to the ...
... QT duration and myocardial hypertrophy In penetrant subjects, and despite a smaller maximum wall thickness, patients with a mutation on the MyBPC gene had a longer Qtcmax than those with a mutation on the β-MHC gene. Mutations in the MyBPC or β-MHC genes showed different patterns with respect to the ...
the PDF - Heart Rhythm Society
... annual incidence of SCD ranges between 50 to 100 per 100 000 in the general population.3– 6 Because of the absence of emergency medical response systems in most world regions, worldwide estimates are currently not available.7 However, even in the presence of advanced first responder systems for resu ...
... annual incidence of SCD ranges between 50 to 100 per 100 000 in the general population.3– 6 Because of the absence of emergency medical response systems in most world regions, worldwide estimates are currently not available.7 However, even in the presence of advanced first responder systems for resu ...
Why Measure Heart Rate? - Polar Education Zone: Basic Heart Rate
... Anatomy and Physiology: Understanding the Heart To begin to understand the principles and benefits of heart rate training, we need to first understand the working of the heart as a muscle in the body, and the role that it plays during exercise. The heart is a key component of the body's cardiovascu ...
... Anatomy and Physiology: Understanding the Heart To begin to understand the principles and benefits of heart rate training, we need to first understand the working of the heart as a muscle in the body, and the role that it plays during exercise. The heart is a key component of the body's cardiovascu ...
Circulation: Heart Failure Topic Review
... Summary: Molecular research in heart failure points to the hypothesis that a generic cardiac genomic response is activated in the failing myocardium regardless of the original inciting cause. This cardiac genomic stress response is typified by the reexpression of fetal genes, upregulation of fibrosi ...
... Summary: Molecular research in heart failure points to the hypothesis that a generic cardiac genomic response is activated in the failing myocardium regardless of the original inciting cause. This cardiac genomic stress response is typified by the reexpression of fetal genes, upregulation of fibrosi ...
Patients` drawings illustrate psychological and functional status in
... hypothesis that damage drawn would be associated with the cause of heart failure being ischemic heart disease. Heart drawings and psychological status We also investigated the hypothesis that damage drawn on the heart, larger height and area drawings, and greater difference in height and area betwee ...
... hypothesis that damage drawn would be associated with the cause of heart failure being ischemic heart disease. Heart drawings and psychological status We also investigated the hypothesis that damage drawn on the heart, larger height and area drawings, and greater difference in height and area betwee ...
Human Pavlovian HR-Decelerative Conditioning With Negative Tilt
... attained. The table was then rotated to a 45O, headdown position for 20-27 s (variation due to lack of automation in the procedure), before being returned to the control position. There were two such 90” tilt trials both before and after the bilateral vagotomy. The reported data are based on the fir ...
... attained. The table was then rotated to a 45O, headdown position for 20-27 s (variation due to lack of automation in the procedure), before being returned to the control position. There were two such 90” tilt trials both before and after the bilateral vagotomy. The reported data are based on the fir ...
Oxidative stress and heart failure - AJP
... activity of electron transport chain complex I, III, and IV all decreased in mice subjected to MI (37). Wu et al. (115) also demonstrated that COX III overexpression resulted in a decreased abundance of COX I and a decrease in COX activity, accompanied by increased apoptosis in HF following MI. The ...
... activity of electron transport chain complex I, III, and IV all decreased in mice subjected to MI (37). Wu et al. (115) also demonstrated that COX III overexpression resulted in a decreased abundance of COX I and a decrease in COX activity, accompanied by increased apoptosis in HF following MI. The ...
NOCSAE Proposed Chest Protector Standard for Commotio Cordis
... Commotio cordis, a heart rhythm disruption caused by a blow to the chest, is one of the leading causes of sudden cardiac death in athletes. The condition is an episode of ventricular fibrillation induced by a direct blow to the chest over the heart during a specific portion of the heart’s electrical ...
... Commotio cordis, a heart rhythm disruption caused by a blow to the chest, is one of the leading causes of sudden cardiac death in athletes. The condition is an episode of ventricular fibrillation induced by a direct blow to the chest over the heart during a specific portion of the heart’s electrical ...
Effect of adenosine on heart rate variability in
... overrides its direct negative chronotropic effect. We tested the hypothesis that adenosine increases heart rate by suppressing parasympathetic and augmenting sympathetic components of heart rate variability. High-frequency (PH ; 0.15–0.50 Hz) and low-frequency (PL ; 0.05–0.15 Hz) components of heart ...
... overrides its direct negative chronotropic effect. We tested the hypothesis that adenosine increases heart rate by suppressing parasympathetic and augmenting sympathetic components of heart rate variability. High-frequency (PH ; 0.15–0.50 Hz) and low-frequency (PL ; 0.05–0.15 Hz) components of heart ...
Cardiac output (CO) and systemic vascular resistance (SVR)– the
... Conditions increasing CO directly: • Pain, fear? • However– increased CO requires increased venous return. • Healthy heart pumps out what it receives (Frank-Starling mechanism). • Heart can be seen as “passive” servant of periphery! ...
... Conditions increasing CO directly: • Pain, fear? • However– increased CO requires increased venous return. • Healthy heart pumps out what it receives (Frank-Starling mechanism). • Heart can be seen as “passive” servant of periphery! ...
The Treatment of Atrial Fibrillation - Michigan Medicine
... and this may result in symptoms of weakness, fatigue, dizziness, or shortness of breath. However, some patients who have atrial fibrillation are completely unaware of it, and have no symptoms at all. Atrial fibrillation may be “paroxysmal” or “persistent.” Paroxysmal atrial fibrillation refers to at ...
... and this may result in symptoms of weakness, fatigue, dizziness, or shortness of breath. However, some patients who have atrial fibrillation are completely unaware of it, and have no symptoms at all. Atrial fibrillation may be “paroxysmal” or “persistent.” Paroxysmal atrial fibrillation refers to at ...