Cardiac Cycle - Sonoma Valley High School
... Cardiac Cycle • Three Phases • First Phase – Relaxation period • All chambers in diastole. • Blood fills SL valves • Blood flows into atria & ventricles from pulmonary veins and vena cava. ...
... Cardiac Cycle • Three Phases • First Phase – Relaxation period • All chambers in diastole. • Blood fills SL valves • Blood flows into atria & ventricles from pulmonary veins and vena cava. ...
Properties of Cardiac Muscle
... IV. Rhythmicity (automaticity): = the ability of cardiac ms to contract in a regular constant manner w/out nerve supply. ...
... IV. Rhythmicity (automaticity): = the ability of cardiac ms to contract in a regular constant manner w/out nerve supply. ...
Artificial Pacemakers - McMaster University > ECE
... Autorhythmic fibers are specialized cardiac muscle cells that cause an inherent and rhythmical electrical activity in the heart Autorhythmic fibers are self excitable- they simulate contraction without a requisite electrical impulse from the central nervous system A single cardiac muscle cell can co ...
... Autorhythmic fibers are specialized cardiac muscle cells that cause an inherent and rhythmical electrical activity in the heart Autorhythmic fibers are self excitable- they simulate contraction without a requisite electrical impulse from the central nervous system A single cardiac muscle cell can co ...
LPN-C - Faculty Sites
... ◦ Impulses initiated at the SA node at an intrinsic rate of 60-100 beats per minute ...
... ◦ Impulses initiated at the SA node at an intrinsic rate of 60-100 beats per minute ...
Arrhythmogenic Right Ventricular Cardiomyopathy
... change, especially in athletes or other individuals with high exercise levels in whom there is some evidence that symptoms and sudden death present at a younger age. Knowledge of the responsible genetic mutations is presently incomplete and their relation to the phenotype is likely complex. ...
... change, especially in athletes or other individuals with high exercise levels in whom there is some evidence that symptoms and sudden death present at a younger age. Knowledge of the responsible genetic mutations is presently incomplete and their relation to the phenotype is likely complex. ...
Autoregulation of cardiac output is overcome by adrenergic
... The first trial was carried out at the intrinsic heart rate. For the second trial, two silver electrodes were placed on either side of the right atrium for electrical pacing of the heart using a Grass SD9 stimulator (Quincy, MA, USA) to attain a heart rate of 50 beats min−1 (0.83 Hz); pilot experime ...
... The first trial was carried out at the intrinsic heart rate. For the second trial, two silver electrodes were placed on either side of the right atrium for electrical pacing of the heart using a Grass SD9 stimulator (Quincy, MA, USA) to attain a heart rate of 50 beats min−1 (0.83 Hz); pilot experime ...
In General The Specifics
... 7. Understand what pacemaker potentials are, and the ion movements that cause them. 8. Explain why action potentials in the ventricles look different that those of the atria and the physiological events that cause them. 9. Explain what ions cause the refractory period in the heart and the importance ...
... 7. Understand what pacemaker potentials are, and the ion movements that cause them. 8. Explain why action potentials in the ventricles look different that those of the atria and the physiological events that cause them. 9. Explain what ions cause the refractory period in the heart and the importance ...
Abnormal Left Ventricular Relaxation in Hypertensive Patients
... In contrast with these similarities between normotensive and hypertensive subjects, the two groups differed significantly in respect to the maximum rate of left ventricular filling (maximum +dv/df). The filling rate was significantly slower in hypertensive patients than in normotensive subjects (Fig ...
... In contrast with these similarities between normotensive and hypertensive subjects, the two groups differed significantly in respect to the maximum rate of left ventricular filling (maximum +dv/df). The filling rate was significantly slower in hypertensive patients than in normotensive subjects (Fig ...
Circulatory Systems
... by 20% - 30%. For those in good health, increased energy demands during extreme exercise can raise the heart rate to an incredible 200 beats per minute. Although few individuals can sustain such a rapid ...
... by 20% - 30%. For those in good health, increased energy demands during extreme exercise can raise the heart rate to an incredible 200 beats per minute. Although few individuals can sustain such a rapid ...
Total Dissolved Solids
... as caffeine or nicotine in the blood, and the age of the person. As a rule, the maximum heart rate of all individuals of the same age and sex is about the same. However, the time it takes individuals to reach that maximum level while exercising varies greatly. Since physically fit people can deliver ...
... as caffeine or nicotine in the blood, and the age of the person. As a rule, the maximum heart rate of all individuals of the same age and sex is about the same. However, the time it takes individuals to reach that maximum level while exercising varies greatly. Since physically fit people can deliver ...
Cardiomyopathies
... • Dilated cardiomyopathy is the most common form of cardiomyopathy. • It occurs more frequently in men than in women, and is most common between the ages of 20 and 60 years. • About one in three cases of CHF is due to dilated cardiomyopathy. • Dilated cardiomyopathy also occurs in children. ...
... • Dilated cardiomyopathy is the most common form of cardiomyopathy. • It occurs more frequently in men than in women, and is most common between the ages of 20 and 60 years. • About one in three cases of CHF is due to dilated cardiomyopathy. • Dilated cardiomyopathy also occurs in children. ...
Reduction of QRS duration following pulmonary valve replacement
... prolongation following PVR, this may indicate reduced arrhythmia vulnerability. Currently, most centres are only performing PVR on patients who are symptomatic with exercise intolerance or clinical arrhythmia, or those with the most severe RV dilation. If, indeed, there is a threshold above which RV ...
... prolongation following PVR, this may indicate reduced arrhythmia vulnerability. Currently, most centres are only performing PVR on patients who are symptomatic with exercise intolerance or clinical arrhythmia, or those with the most severe RV dilation. If, indeed, there is a threshold above which RV ...
Electrical Activation Of The Ventricular Myocardium
... The purposes of the present investigation were to determine the sequence of ventricular myocardial activation and to look for any specialized conductive tissue pathways in the crocodilian ventricular myocardium. The use of penetrating multi-point electrodes to investigate the spread of electrical ac ...
... The purposes of the present investigation were to determine the sequence of ventricular myocardial activation and to look for any specialized conductive tissue pathways in the crocodilian ventricular myocardium. The use of penetrating multi-point electrodes to investigate the spread of electrical ac ...
Chapter 12 - Napa Valley College
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
The Cardiovascular System: The Heart
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
The Cardiovascular System: The Heart
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
... contractions in a skeletal muscle (above) and cardiac muscle (below). The shaded areas indicate the duration of the refractory periods. ...
Tina`s EKG Rhythm Recognition Notes
... QRS will be normal Junctional tachycardia—6.3 Rhythm is regular Rate is 100 – 180 beats per minute P-waves, if visible, will be inverted, but may be before or after the QRS complex P-R interval will be less than 0.12 seconds, unless it follows the QRS complex QRS will be normal Heart blocks They’re ...
... QRS will be normal Junctional tachycardia—6.3 Rhythm is regular Rate is 100 – 180 beats per minute P-waves, if visible, will be inverted, but may be before or after the QRS complex P-R interval will be less than 0.12 seconds, unless it follows the QRS complex QRS will be normal Heart blocks They’re ...
HEART RATE VARIABILITY
... dimension, Lyapunor exponents and Kolmogorov entropy have been used (Babloyantz and Destexhe, 1988). CONCLUSION The heart rate of healthy persons displays beat-to-beat variations that results from fluctuations in autonomic nervous system activity at the sinus node. Heart rate variability (HRV) decre ...
... dimension, Lyapunor exponents and Kolmogorov entropy have been used (Babloyantz and Destexhe, 1988). CONCLUSION The heart rate of healthy persons displays beat-to-beat variations that results from fluctuations in autonomic nervous system activity at the sinus node. Heart rate variability (HRV) decre ...
was usually unchanged during regular tachycardia.
... fibrillation; increased venous saturation does not occur. The determining factor then is mitral stenosis; in its presence, auricular fibrillation is an advantage, without it, a disadvantage. This correlation is however too curious to permit its being maintained on the basis of these few observations ...
... fibrillation; increased venous saturation does not occur. The determining factor then is mitral stenosis; in its presence, auricular fibrillation is an advantage, without it, a disadvantage. This correlation is however too curious to permit its being maintained on the basis of these few observations ...
Sudden cardiac death
... Sudden death accounts for about a half of all deaths in patients with this diagnosis. Sudden death often occurs relatively late in the course of dilated cardiomyopathy, after hemodynamic symptoms have been present for some time. Even with well-documented clinical episodes of ventricular tachycardia ...
... Sudden death accounts for about a half of all deaths in patients with this diagnosis. Sudden death often occurs relatively late in the course of dilated cardiomyopathy, after hemodynamic symptoms have been present for some time. Even with well-documented clinical episodes of ventricular tachycardia ...
Role of sinoatrial node architecture in maintaining a balanced
... The sinoatrial node is a collection of weakly coupled, heterogeneous cells, including pacemaker cells as well as non-pacemaker cells such as atrial myocytes, adipocytes and fibroblasts. Within the node, pacemaker cells vary by size and electrophysiological properties and may be divided into three ma ...
... The sinoatrial node is a collection of weakly coupled, heterogeneous cells, including pacemaker cells as well as non-pacemaker cells such as atrial myocytes, adipocytes and fibroblasts. Within the node, pacemaker cells vary by size and electrophysiological properties and may be divided into three ma ...
2-Beta receptor blockers-1
... Have cardio-protective effect infarct size morbidity & mortality myocardial O2 demand. • Anti-arrhythmic action. • incidence of sudden death. ...
... Have cardio-protective effect infarct size morbidity & mortality myocardial O2 demand. • Anti-arrhythmic action. • incidence of sudden death. ...
New diagnostic and technical aspects of fetal phonocardiography
... of distinct events, such as the opening and closing of the heart valves. Consequently the diagnostic potential was restricted to parameters related to the heart rate and the cardiac time intervals. This restriction was exacerbated by the disastrous quality of the available phonotransducers. Conventi ...
... of distinct events, such as the opening and closing of the heart valves. Consequently the diagnostic potential was restricted to parameters related to the heart rate and the cardiac time intervals. This restriction was exacerbated by the disastrous quality of the available phonotransducers. Conventi ...
1st PRESENTATION
... Complex clinical syndrome that can result from any structural or functional cardiac disorders that impairs the ability of the ventricle to fill with or eject blood. [2] ...
... Complex clinical syndrome that can result from any structural or functional cardiac disorders that impairs the ability of the ventricle to fill with or eject blood. [2] ...
Noradrenergic Transmission
... Have cardio-protective effect infarct size morbidity & mortality myocardial O2 demand. • Anti-arrhythmic action. • incidence of sudden death. ...
... Have cardio-protective effect infarct size morbidity & mortality myocardial O2 demand. • Anti-arrhythmic action. • incidence of sudden death. ...