Cardiac applications of optogenetics
... contribution of the ChR2 current during an action potential e data not available in the published neuroscience or cardiac optogenetics literature. Since ChR2 current (IChR2) is both light- and voltagesensitive, its contribution during a dynamically changing membrane voltage is not trivial, and cardi ...
... contribution of the ChR2 current during an action potential e data not available in the published neuroscience or cardiac optogenetics literature. Since ChR2 current (IChR2) is both light- and voltagesensitive, its contribution during a dynamically changing membrane voltage is not trivial, and cardi ...
- Wiley Online Library
... through the common outflow tract and symmetric, bilaterally paired aortic arches. Most often three aortic arch pairs are present at stage 21, although a variety of patterns have been documented associated with flow and vessel caliber mismatch (Kowalski et al., 2013). The stage 21 embryonic heart rat ...
... through the common outflow tract and symmetric, bilaterally paired aortic arches. Most often three aortic arch pairs are present at stage 21, although a variety of patterns have been documented associated with flow and vessel caliber mismatch (Kowalski et al., 2013). The stage 21 embryonic heart rat ...
Cardiac autonomic modulation in judo athletes: evaluation by linear
... modulation and lower relative sympathetic modulation. Recently, it has been suggested that cardiovascular autonomic regulations are an important determinant of training adaptations and are also responsive to training effects [19, 20]. Heart rate variability (HRV) has been used as an important marker ...
... modulation and lower relative sympathetic modulation. Recently, it has been suggested that cardiovascular autonomic regulations are an important determinant of training adaptations and are also responsive to training effects [19, 20]. Heart rate variability (HRV) has been used as an important marker ...
Multidimensional Analytical Study of Heart Sounds: A Review
... it is reported that few heart valve diseases are best detected only by means of auscultation process [48]. Auscultation is the most common and cost-effective technique, continues to provide an important source of clinical information related to heart valves and also, cannot be totally replaced by al ...
... it is reported that few heart valve diseases are best detected only by means of auscultation process [48]. Auscultation is the most common and cost-effective technique, continues to provide an important source of clinical information related to heart valves and also, cannot be totally replaced by al ...
Full-Text PDF
... to disease or underlying pathology. Enlargement of the ventricular cavities, or increases in myocardial wall thickness, occur in response to an enhanced volume load or an increase in wall stress, respectively. Thus, the altered hemodynamics associated with cardiac disease, such as valvular regurgita ...
... to disease or underlying pathology. Enlargement of the ventricular cavities, or increases in myocardial wall thickness, occur in response to an enhanced volume load or an increase in wall stress, respectively. Thus, the altered hemodynamics associated with cardiac disease, such as valvular regurgita ...
Resting Heart Rate and the Risk of Heart Failure in Healthy Adults
... participants developed incident heart failure. Crude incidence rates of heart failure were higher in men with higher heart rate than in men with lower heart rate, with 13.7 versus 9.9 per 1,000 person-years. In women, crude incidence rates of heart failure were similar across heart rate categories, ...
... participants developed incident heart failure. Crude incidence rates of heart failure were higher in men with higher heart rate than in men with lower heart rate, with 13.7 versus 9.9 per 1,000 person-years. In women, crude incidence rates of heart failure were similar across heart rate categories, ...
Characterisation of the human embryonic and foetal epicardium
... WT1 expression (Fig. 2C) at CS20. However, whereas the atrial epicardium represented a uniform podoplanin- and WT1-expressing single-cell layer (Fig. 2D-G), areas of expanded epicardium were observed in the ventricles (Fig. 2H-K), demarcated by podoplanin expression (Fig. 2J, double-arrow) and compr ...
... WT1 expression (Fig. 2C) at CS20. However, whereas the atrial epicardium represented a uniform podoplanin- and WT1-expressing single-cell layer (Fig. 2D-G), areas of expanded epicardium were observed in the ventricles (Fig. 2H-K), demarcated by podoplanin expression (Fig. 2J, double-arrow) and compr ...
The Mechanics of Left Ventricular Contraction in Acute
... curve of the ventricle was determined immediately at the conclusion of each experiment by arresting the heart with potassium, occluding the aortic and mitral valves, and filling the cavity with 2-ml increments of fluid; from this curve the left ventricular end-diastolic volume for each contraction d ...
... curve of the ventricle was determined immediately at the conclusion of each experiment by arresting the heart with potassium, occluding the aortic and mitral valves, and filling the cavity with 2-ml increments of fluid; from this curve the left ventricular end-diastolic volume for each contraction d ...
Controlled Trial of Physical Training in Chronic Heart
... test was performed (supine posture) during which hemodynamic measurements were made. Measurements were made at rest and at the end of each 4-minute, 25-W incremental stage of the supine bicycle exercise test (Elema-Schonander, AM 368, Stockholm). Pulsedwave Doppler ultrasonic measurements of ascendi ...
... test was performed (supine posture) during which hemodynamic measurements were made. Measurements were made at rest and at the end of each 4-minute, 25-W incremental stage of the supine bicycle exercise test (Elema-Schonander, AM 368, Stockholm). Pulsedwave Doppler ultrasonic measurements of ascendi ...
Regional expression of cardiac ion channels and
... than in ventricles, whereas Herg pr otein expression in mice and humans was higher in the ventricle. 14 RNase protection assays found similar levels of Herg mRNA in rabbit left atrium, left ventricle, SA node and in canine Pur kinje fi br es, left and r ight ventr icle suggesting that either intersp ...
... than in ventricles, whereas Herg pr otein expression in mice and humans was higher in the ventricle. 14 RNase protection assays found similar levels of Herg mRNA in rabbit left atrium, left ventricle, SA node and in canine Pur kinje fi br es, left and r ight ventr icle suggesting that either intersp ...
How to differentiate athlete`s heart from pathological
... and might exceed 55 mm only in the end-stage phase, when heart failure and systolic dysfunction are present (27). Left ventricular mass and, particularly, left ventricular mass index should be always calculated when we assess the athlete’s heart. The upper limit of physiological hypertrophy is consi ...
... and might exceed 55 mm only in the end-stage phase, when heart failure and systolic dysfunction are present (27). Left ventricular mass and, particularly, left ventricular mass index should be always calculated when we assess the athlete’s heart. The upper limit of physiological hypertrophy is consi ...
Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasia
... and histological features of the disease were classified into major and minor criteria. The presence of 2 major, 1 major and 2 minor, or 4 minor criteria from the various categories sets the diagnosis with high specificity, but low sensitivity. For first-degree relatives of patients with ARVC/D (who ...
... and histological features of the disease were classified into major and minor criteria. The presence of 2 major, 1 major and 2 minor, or 4 minor criteria from the various categories sets the diagnosis with high specificity, but low sensitivity. For first-degree relatives of patients with ARVC/D (who ...
Deaths in long-term paced patients
... found in only 2 others of the 8i necropsies. and ectopic ventricular beats. Table 2 shows the incidence of unexplained death ...
... found in only 2 others of the 8i necropsies. and ectopic ventricular beats. Table 2 shows the incidence of unexplained death ...
the PDF - Heart Rhythm Society
... spectrum of arrhythmias, both supraventricular and ventricular tachyarrhythmias as well as bradyarrhythmias. Trainees who wish to become skilled in some of the more complex electrophysiology procedures (e.g., ablation for atrial fibrillation or evaluation of patients with congenital heart disease) w ...
... spectrum of arrhythmias, both supraventricular and ventricular tachyarrhythmias as well as bradyarrhythmias. Trainees who wish to become skilled in some of the more complex electrophysiology procedures (e.g., ablation for atrial fibrillation or evaluation of patients with congenital heart disease) w ...
PDF Article
... with digoxin results in a significant increasein parasympathetic activity and a decrease in sympathetic activity in patients with chronic heart failure. Severalwell validated measuresof beat to beat variations in normal RR intervals are available to assessparasympathetic nervous systemactivity in hu ...
... with digoxin results in a significant increasein parasympathetic activity and a decrease in sympathetic activity in patients with chronic heart failure. Severalwell validated measuresof beat to beat variations in normal RR intervals are available to assessparasympathetic nervous systemactivity in hu ...
Document
... • Also, sudden onset atrial tachycardia is common in patients who have Wolff-ParkinsonWhite syndrome • Other causes include: Fast & Easy ECGs, 2E ...
... • Also, sudden onset atrial tachycardia is common in patients who have Wolff-ParkinsonWhite syndrome • Other causes include: Fast & Easy ECGs, 2E ...
Newly Diagnosed Atrial Fibrillation
... regularity of the cardiac cycle, especially when accompanied by short coupling intervals, and rapid heart rates in atrial fibrillation lead to a reduction in diastolic filling, stroke volume, and cardiac output. In a study of patients who were evaluated while in atrial fibrillation and again during ...
... regularity of the cardiac cycle, especially when accompanied by short coupling intervals, and rapid heart rates in atrial fibrillation lead to a reduction in diastolic filling, stroke volume, and cardiac output. In a study of patients who were evaluated while in atrial fibrillation and again during ...
Cardiovascular system
... 1. Sinus node "SA" node: also called sinoatrial node, located in the right atrium. It is concerned with the generation of rhythmical impulse; it is the pacemaker of the heart that initiates each heart beat. This automatic nature of the heart beat is referred to as automaticity. 2. Internodal pathway ...
... 1. Sinus node "SA" node: also called sinoatrial node, located in the right atrium. It is concerned with the generation of rhythmical impulse; it is the pacemaker of the heart that initiates each heart beat. This automatic nature of the heart beat is referred to as automaticity. 2. Internodal pathway ...
Editorials Original Articles - Circulation: Cardiovascular Imaging
... Permissions: Requests for permissions to reproduce figures, tables, or portions of articles originally published in Circulation: Cardiovascular Imaging can be obtained via RightsLink, a service of the Copyright Clearance Center, not the Editorial Office. Once the online version of the published arti ...
... Permissions: Requests for permissions to reproduce figures, tables, or portions of articles originally published in Circulation: Cardiovascular Imaging can be obtained via RightsLink, a service of the Copyright Clearance Center, not the Editorial Office. Once the online version of the published arti ...
3. carditis
... value in their appearance is given coxsackievirus, especially groups A and B, and ECHO. Other etiologic factors include influenza and parainfluenza viruses, measles, mumps, cytomegalovirus, etc. MN can be caused by bacteria, rickettsia, fungi, and other infectious agents. Funds are also MH infectiou ...
... value in their appearance is given coxsackievirus, especially groups A and B, and ECHO. Other etiologic factors include influenza and parainfluenza viruses, measles, mumps, cytomegalovirus, etc. MN can be caused by bacteria, rickettsia, fungi, and other infectious agents. Funds are also MH infectiou ...
as PDF
... ions crossing the cell membrane via ion channels alter the membrane potential in a dynamic manner. The time- and voltage-dependent inward current (e.g., Na+ current) makes the membrane more positive (or less negative), whereas the time- and voltage-dependent outward current (e.g., K+ current) drives ...
... ions crossing the cell membrane via ion channels alter the membrane potential in a dynamic manner. The time- and voltage-dependent inward current (e.g., Na+ current) makes the membrane more positive (or less negative), whereas the time- and voltage-dependent outward current (e.g., K+ current) drives ...
A dynamical model for generating synthetic electrocardiogram signals
... is sufficient. For ECGs with noise and artefacts it may be necessary to use more complicated methods [2], [3]. A comparison between the continuous process with power spectrum given by (3) and the piecewise constant reconstruction of the RR-process obtained from the R-peak detection (Fig. 7) illustra ...
... is sufficient. For ECGs with noise and artefacts it may be necessary to use more complicated methods [2], [3]. A comparison between the continuous process with power spectrum given by (3) and the piecewise constant reconstruction of the RR-process obtained from the R-peak detection (Fig. 7) illustra ...
Atrial Fibrillation: New Horizons
... Atrial fibrillation (AF) is the most common cardiac arrhythmia seen in clinical practice. The understanding of the pathophysiology of AF has changed drastically during the last several decades. Recent observations have challenged the concept of the multiple circuit reentry model in favor of single f ...
... Atrial fibrillation (AF) is the most common cardiac arrhythmia seen in clinical practice. The understanding of the pathophysiology of AF has changed drastically during the last several decades. Recent observations have challenged the concept of the multiple circuit reentry model in favor of single f ...
Fish oil reduces heart rate and oxygen
... the hypothesis that omega-3 PUFA alter O2 efficiency in humans, the effects of fish oil supplementation on O2 consumption during exercise were evaluated. Sixteen well-trained men (cyclists), randomly assigned to receive 8x1g capsules per day of olive oil (control) or fish oil (FO) for 8 weeks in a d ...
... the hypothesis that omega-3 PUFA alter O2 efficiency in humans, the effects of fish oil supplementation on O2 consumption during exercise were evaluated. Sixteen well-trained men (cyclists), randomly assigned to receive 8x1g capsules per day of olive oil (control) or fish oil (FO) for 8 weeks in a d ...
The invention of the stethoscope: A milestone in cardiology
... heart beat when, in 1818, Laennec (Quimper, 1781–Douarnenez, 1826) invented a practical measuring instrument that he christened the stethoscope. The author’s writings discussing his invention are worthy of commentary, not only so as to understand the author’s chain of thought but also to see how a n ...
... heart beat when, in 1818, Laennec (Quimper, 1781–Douarnenez, 1826) invented a practical measuring instrument that he christened the stethoscope. The author’s writings discussing his invention are worthy of commentary, not only so as to understand the author’s chain of thought but also to see how a n ...