Human Physiology/The cardiovascular system
... from flowing back into the ventricles. The sound heard in a heart beat is the heart valves shutting. The right AV valve is also called the tricuspid valve because it has three flaps. It is located between the right atrium and the right ventricle. The tricuspid valve allows blood to flow from the rig ...
... from flowing back into the ventricles. The sound heard in a heart beat is the heart valves shutting. The right AV valve is also called the tricuspid valve because it has three flaps. It is located between the right atrium and the right ventricle. The tricuspid valve allows blood to flow from the rig ...
Complete heart blockin rheumatoid arthritis
... also infiltration of the conducting system by lymphocytes, plasma cells, and histiocytes has been described (cases 6, 10, and 27). In case 14, where fibroelastosis of the conduction system was found, the authors speculated that this was the end result of healed granulomas in the region of the bifurc ...
... also infiltration of the conducting system by lymphocytes, plasma cells, and histiocytes has been described (cases 6, 10, and 27). In case 14, where fibroelastosis of the conduction system was found, the authors speculated that this was the end result of healed granulomas in the region of the bifurc ...
Successful Ablation of Atrioventricular Nodal Re
... crura, and enters the thorax as the azygos vein. Occasionally, interruption starts at lower levels, and veins from these structures drain to the azygos vein. Afterward, the azygos vein joins the superior vena cava at the right paratracheal space.3 A tortuous course of the azygos continuation complic ...
... crura, and enters the thorax as the azygos vein. Occasionally, interruption starts at lower levels, and veins from these structures drain to the azygos vein. Afterward, the azygos vein joins the superior vena cava at the right paratracheal space.3 A tortuous course of the azygos continuation complic ...
Post-exercise heart rate recovery: an index of cardiovascular fitness
... increasing the workload attained at a given heart rate (1). Increased endurance capacity has been shown to be one of the indices of cardiovascular fitness (4). Studies have also demonstrated that exercise endurance capacity is linearly related to HRR (64, 65). Similarly, HRR is accelerated in endura ...
... increasing the workload attained at a given heart rate (1). Increased endurance capacity has been shown to be one of the indices of cardiovascular fitness (4). Studies have also demonstrated that exercise endurance capacity is linearly related to HRR (64, 65). Similarly, HRR is accelerated in endura ...
Cardiac System - Nursing Education Consultants
... MI, all of which can lead to sudden cardiac death. B. Unstable angina pectoris occurs when a thrombus partially occludes a coronary artery causing prolonged symptoms of ischemia which can occur at rest. ...
... MI, all of which can lead to sudden cardiac death. B. Unstable angina pectoris occurs when a thrombus partially occludes a coronary artery causing prolonged symptoms of ischemia which can occur at rest. ...
Evaluating strict and conventional left bundle
... defibrillators by having an additional lead for LV epicardial stimulation. The additional LV lead needed for CRT carries an additional risk of complications; clinical trials have reported an overall complication rate of 15%, of which 10% is related to the LV lead.1 – 4 Although CRT devices improve ...
... defibrillators by having an additional lead for LV epicardial stimulation. The additional LV lead needed for CRT carries an additional risk of complications; clinical trials have reported an overall complication rate of 15%, of which 10% is related to the LV lead.1 – 4 Although CRT devices improve ...
Energy metabolism patterns in mammalian myocardium adapted to
... myosine [43-451. Indeed, the rate of force development and the velocity of shortening are correlated with the myocardial V,/V, isoenzyme ratio and with the level of myosin ATPase activity [39,46-481 whereas the economy of isometric force development development is inversely related to this ratio [49 ...
... myosine [43-451. Indeed, the rate of force development and the velocity of shortening are correlated with the myocardial V,/V, isoenzyme ratio and with the level of myosin ATPase activity [39,46-481 whereas the economy of isometric force development development is inversely related to this ratio [49 ...
Arbitrary Lagrangian-Eulerian Finite Element Modelling of the
... of the hearts ventricles has slowed down, but before the atria contract to complete the lling. ...
... of the hearts ventricles has slowed down, but before the atria contract to complete the lling. ...
Introducing a novel mechanism to control heart rate in the ancestral
... in dimethyl sulfoxide (DMSO; Sigma-Aldrich) for a final DMSO concentration of up to 0.01 µl DMSO ml−1 saline in the final preparation. Additions of up to 10 µl DMSO ml−1 saline had no effect ...
... in dimethyl sulfoxide (DMSO; Sigma-Aldrich) for a final DMSO concentration of up to 0.01 µl DMSO ml−1 saline in the final preparation. Additions of up to 10 µl DMSO ml−1 saline had no effect ...
Diesel Exhaust Inhalation Increases Cardiac
... Radiotelemetry data acquisition and analysis. Radiotelemetry was used to track changes in cardiovascular and thermoregulatory function by continuously monitoring ECG, core body temperature, and activity in awake, unrestrained rats beginning at 3 days before inhalation exposure and continuing throu ...
... Radiotelemetry data acquisition and analysis. Radiotelemetry was used to track changes in cardiovascular and thermoregulatory function by continuously monitoring ECG, core body temperature, and activity in awake, unrestrained rats beginning at 3 days before inhalation exposure and continuing throu ...
Full PDF - IOSR Journal of Pharmacy
... The results on cardiotonic activity of paraoxon induced and normal parotoid gland secretions (without induction) are presented in Tables 1&2, Fig 1&2 and Graphs.1&2. The results indicated that the parotoid exudates on isolated perfused frog hearts elicited dose dependent effect. There was an increas ...
... The results on cardiotonic activity of paraoxon induced and normal parotoid gland secretions (without induction) are presented in Tables 1&2, Fig 1&2 and Graphs.1&2. The results indicated that the parotoid exudates on isolated perfused frog hearts elicited dose dependent effect. There was an increas ...
Visceral pericardium
... The Cardiac Cycle – The contraction pattern of the myocardium • Determined by the conduction system ...
... The Cardiac Cycle – The contraction pattern of the myocardium • Determined by the conduction system ...
left axis deviation
... HR=72bpm; PR=0.16s; QRS=0.09s; QT=0.36s; QRS axis = -70o (left axis deviation) Normal sinus rhythm; normal SA and AV conduction; rS in leads II, III, aVF Interpretation: Abnormal ECG: 1)Left anterior fascicular block ...
... HR=72bpm; PR=0.16s; QRS=0.09s; QT=0.36s; QRS axis = -70o (left axis deviation) Normal sinus rhythm; normal SA and AV conduction; rS in leads II, III, aVF Interpretation: Abnormal ECG: 1)Left anterior fascicular block ...
Investigation of syncope
... should be routine. A urinary hCG test should also be performed as pregnancy is not an infrequent cause of new syncope in females, and routine urinary hCG testing avoids unnecessary further investigation. However, an actively haemorrhaging ectopic pregnancy may occasionally be painless. 3. Laboratory ...
... should be routine. A urinary hCG test should also be performed as pregnancy is not an infrequent cause of new syncope in females, and routine urinary hCG testing avoids unnecessary further investigation. However, an actively haemorrhaging ectopic pregnancy may occasionally be painless. 3. Laboratory ...
Risk of Arrhythmia Recurrence After Successful Ablation of
... risk factors for thromboembolic events. We believe that this definition should also exclude patients with history of heart surgery or any comorbidities known to be associated with AF, such as pulmonary and thyroid disorders as well as obstructive sleep apnea, based on available evidence. Patients wi ...
... risk factors for thromboembolic events. We believe that this definition should also exclude patients with history of heart surgery or any comorbidities known to be associated with AF, such as pulmonary and thyroid disorders as well as obstructive sleep apnea, based on available evidence. Patients wi ...
Histological study of the atrioventricular node and bundle in the
... four-month-old ovine fetuses. The histological structure of these components was studied by routine histological techniques and use of specific staining methods. The AVN was caudally located adjacent to the root of the aorta. It was almost spherical in shape and consisted of twisty cells. The node w ...
... four-month-old ovine fetuses. The histological structure of these components was studied by routine histological techniques and use of specific staining methods. The AVN was caudally located adjacent to the root of the aorta. It was almost spherical in shape and consisted of twisty cells. The node w ...
Changes in heart rate during obstructive sleep apnoea
... Passive generation of negative intrathoracic pressure of 15 cmHp causes narrowing of the upper airway in supine normal subjects [22]. Active generation of negative intrathoracic pressure by graded inspiratory effort against a closed airway causes only minor narrowing of the upper airway in normal su ...
... Passive generation of negative intrathoracic pressure of 15 cmHp causes narrowing of the upper airway in supine normal subjects [22]. Active generation of negative intrathoracic pressure by graded inspiratory effort against a closed airway causes only minor narrowing of the upper airway in normal su ...
Mechanisms underlying the cardiac pacemaker: the role of
... Four isoforms of the HCN channels are expressed in mammals, and their expression levels vary considerably depending on the animal model[34, 37]. It is generally accepted that the HCN4 subtype is the most abundantly expressed isoform in the cardiac conductive tissue, with predominance in the human, r ...
... Four isoforms of the HCN channels are expressed in mammals, and their expression levels vary considerably depending on the animal model[34, 37]. It is generally accepted that the HCN4 subtype is the most abundantly expressed isoform in the cardiac conductive tissue, with predominance in the human, r ...
chapter 4 classification of heart murmurs using
... Networks to classify six types of heart sounds. Yadi et al (2008) report a classification method based on statistical features extracted using wavelet decomposition and MLP Neural Network to classify five murmurs. Many new techniques have been introduced for efficient heart disease diagnosis. Howeve ...
... Networks to classify six types of heart sounds. Yadi et al (2008) report a classification method based on statistical features extracted using wavelet decomposition and MLP Neural Network to classify five murmurs. Many new techniques have been introduced for efficient heart disease diagnosis. Howeve ...
The importance of mechano-electrical feedback and inertia in
... and adopt a finite element discretization in combination with a classical Bubnov–Galerkin scheme to discretize the test functions δΦ and δϕ and trial functions Φ and ϕ in space within the element domain B0e [24], ...
... and adopt a finite element discretization in combination with a classical Bubnov–Galerkin scheme to discretize the test functions δΦ and δϕ and trial functions Φ and ϕ in space within the element domain B0e [24], ...
Chapter_014 heart lecture
... P wave: the spread of a stimulus through the atria PR interval: the time from initial stimulation of the atria to initial stimulation of the ventricles QRS complex: the spread of a stimulus through the ...
... P wave: the spread of a stimulus through the atria PR interval: the time from initial stimulation of the atria to initial stimulation of the ventricles QRS complex: the spread of a stimulus through the ...
A simple test of one minute heart rate variability during deep
... The study included 60 patients and 60 controls (Table-1). Sixty previously diagnosed Type 2 Diabetes mellitus patients, who were on treatment (age 35–80 years) including 16 females and 44 males, attending outpatient department were recruited for the study from Karnataka Institute of Diabetology. Age ...
... The study included 60 patients and 60 controls (Table-1). Sixty previously diagnosed Type 2 Diabetes mellitus patients, who were on treatment (age 35–80 years) including 16 females and 44 males, attending outpatient department were recruited for the study from Karnataka Institute of Diabetology. Age ...
Titin:a stiff proposal
... DHF patients. How has research on biological changes in the giant polypeptide titin enabled you to progress with your work? There is increasing evidence that titin is genetically altered in patients with heart or muscle conditions such as cardiomyopathy and muscular dystrophy. The most common inheri ...
... DHF patients. How has research on biological changes in the giant polypeptide titin enabled you to progress with your work? There is increasing evidence that titin is genetically altered in patients with heart or muscle conditions such as cardiomyopathy and muscular dystrophy. The most common inheri ...
The Functional Anatomy of Ventricular Contraction
... move different amounts, and in different directions, the connections between the myocardial layers must be put under tension (vide infra). The distance between markers on opposite sides of the ventricular chamber remained large at the end of systole, indicating that large volumes of blood remained w ...
... move different amounts, and in different directions, the connections between the myocardial layers must be put under tension (vide infra). The distance between markers on opposite sides of the ventricular chamber remained large at the end of systole, indicating that large volumes of blood remained w ...
Electrophysiological..
... (AV) node–dependent long RP supraventricular tachycardia (SVT) can be difficult. Standard diagnostic criteria are lacking and often extrapolated from pacing maneuvers applied to the more common short RP SVT. Long RP SVTs involving concealed nodofascicular (NF) accessory pathways (AP) are particularl ...
... (AV) node–dependent long RP supraventricular tachycardia (SVT) can be difficult. Standard diagnostic criteria are lacking and often extrapolated from pacing maneuvers applied to the more common short RP SVT. Long RP SVTs involving concealed nodofascicular (NF) accessory pathways (AP) are particularl ...