Bundle-Branch Block
... to this question, it may be emphasized that the interpretation of changes in the electrocardiogram that are helpful as indications of ventricular hypertrophy are quite different for the clinician at the bedside, where the tracing is used in conjunction with all the other evidence, than for the pure ...
... to this question, it may be emphasized that the interpretation of changes in the electrocardiogram that are helpful as indications of ventricular hypertrophy are quite different for the clinician at the bedside, where the tracing is used in conjunction with all the other evidence, than for the pure ...
Fundamentals of Electrocardiography Part I
... • The first wave in the cardiac cycle • Represents atrial depolarization and spread ...
... • The first wave in the cardiac cycle • Represents atrial depolarization and spread ...
Gallop Rhythm of the Heart
... aortic-pulmonary window. Interatrial septal defect increases diastolic filling of the right ventricle and rapid-filling gallop of the right ventricle may occur. More common than ventricular gallop due to an increased filling wave is ventricular gallop due to altered accommodation during the volume c ...
... aortic-pulmonary window. Interatrial septal defect increases diastolic filling of the right ventricle and rapid-filling gallop of the right ventricle may occur. More common than ventricular gallop due to an increased filling wave is ventricular gallop due to altered accommodation during the volume c ...
chapter 21 cardiovascular system
... • Placement prostheses for repair of descending thoracic aorta • Synthetic aortic prostheses placed via catheter ...
... • Placement prostheses for repair of descending thoracic aorta • Synthetic aortic prostheses placed via catheter ...
6 Role ofthe Atrioventricular Node in Atrial Fibrillation
... described by Hering in 1903 were, and continue to be, the landmark of the clinical diagnosis of AF (4,5). Sir Thomas Lewis (6) observed the gross irregularity ofthe arrhythmia and stated "the pauses betwixt the heart beats bear no relationship to one another." Thanks to work of Lewis (7), Mackenzie ...
... described by Hering in 1903 were, and continue to be, the landmark of the clinical diagnosis of AF (4,5). Sir Thomas Lewis (6) observed the gross irregularity ofthe arrhythmia and stated "the pauses betwixt the heart beats bear no relationship to one another." Thanks to work of Lewis (7), Mackenzie ...
Atrial Fibrillation in Children
... study indicated, but esophageal monitoring and pacing may be performed relatively easily. Additionally, the transition from the fetal circulation to the neonatal circulation puts added stretch and stress on the left atrium (and the pulmonary veins) due to lower pulmonary resistance and increased pul ...
... study indicated, but esophageal monitoring and pacing may be performed relatively easily. Additionally, the transition from the fetal circulation to the neonatal circulation puts added stretch and stress on the left atrium (and the pulmonary veins) due to lower pulmonary resistance and increased pul ...
sleep, psychological symptoms and quality of life in patients
... advanced under flouroscopy through the aorta into the coronary artery, where the balloon is placed at the stenosis. The balloon is then inflated under high pressure and the stenosis dilated. This treatment has improved and increased dramatically over the last five years. Today, 40-50 % of patients i ...
... advanced under flouroscopy through the aorta into the coronary artery, where the balloon is placed at the stenosis. The balloon is then inflated under high pressure and the stenosis dilated. This treatment has improved and increased dramatically over the last five years. Today, 40-50 % of patients i ...
Cholesterol “Get the Facts”
... What is Cholesterol? Cholesterol is a fatty substance, which is essential to the normal functioning of your body. A certain amount of cholesterol is healthy as it forms part of the cell walls and is necessary to make hormones. ...
... What is Cholesterol? Cholesterol is a fatty substance, which is essential to the normal functioning of your body. A certain amount of cholesterol is healthy as it forms part of the cell walls and is necessary to make hormones. ...
The effect of connexin40 deficiency on ventricular conduction
... ED12.5, the ventricles were activated through the PIR using a preferential pathway along the forming interventricular septum. The frequency of this pattern, initially present in the majority of hearts (Table 1), gradually decreased. Several transitional patterns were ...
... ED12.5, the ventricles were activated through the PIR using a preferential pathway along the forming interventricular septum. The frequency of this pattern, initially present in the majority of hearts (Table 1), gradually decreased. Several transitional patterns were ...
AHA guidelines - Boston University Medical Campus
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
The Right Ventricular Outflow Tract: The Road to Septal Pacing
... surprisingly difficult to attach to the wall as it may not lie in the trabeculated area to the right of the septomarginal trabeculation (Fig. 1). Although advancement of the lead into the pulmonary artery could be achieved using a conventional curve and then the prepared stylet inserted, this has th ...
... surprisingly difficult to attach to the wall as it may not lie in the trabeculated area to the right of the septomarginal trabeculation (Fig. 1). Although advancement of the lead into the pulmonary artery could be achieved using a conventional curve and then the prepared stylet inserted, this has th ...
Bradycardia-dependent triggered activity: relevance
... and in vitro to examine the mechanisms underlying ventricular arrhythmias that are related to prolonged repolarization. Cesium is known to depress normal ventricular automaticity and some experimental arrhythmias by blocking delayed outward currents and prolonging action potential duration. In 10 do ...
... and in vitro to examine the mechanisms underlying ventricular arrhythmias that are related to prolonged repolarization. Cesium is known to depress normal ventricular automaticity and some experimental arrhythmias by blocking delayed outward currents and prolonging action potential duration. In 10 do ...
online supplement
... Wistar rats (Charles River, Saint-Constant, QC, Canada) were randomly assigned to sedentary (Sed) or intensive-exercise (Ex) groups. The exercise program has been previously described (1). Ex-rats underwent daily running training sessions on a treadmill. The treadmill had different lanes to serve as ...
... Wistar rats (Charles River, Saint-Constant, QC, Canada) were randomly assigned to sedentary (Sed) or intensive-exercise (Ex) groups. The exercise program has been previously described (1). Ex-rats underwent daily running training sessions on a treadmill. The treadmill had different lanes to serve as ...
Exercise Standards for Testing and Training A Scientific Statement
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
Surgical Treatment of Ischemic Mitral Valve Regurgitation
... In cases of old myocardial infarction, the presence of mitral valve regurgitation is one of the predicting factors of long-term prognosis. The mechanism of ischemic mitral regurgitation consists of mitral annular dilatation, left ventricular (LV) dilatation followed by tethering of the mitral valve, ...
... In cases of old myocardial infarction, the presence of mitral valve regurgitation is one of the predicting factors of long-term prognosis. The mechanism of ischemic mitral regurgitation consists of mitral annular dilatation, left ventricular (LV) dilatation followed by tethering of the mitral valve, ...
Exercise Standards for Testing and Training
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
... Maximum arteriovenous oxygen difference has a physiological limit of 15 to 17 mL O2 per 100 mL blood. As a consequence, if maximum effort is achieved, V̇o2max can be used to estimate maximum cardiac output. At fixed, mild-to-moderate submaximal workloads below anaerobic threshold (the point during p ...
A STUDY OF CORONARY DOMINANCE
... When both the nodal tissues are irrigated by the same coronary artery, in case of occlusion of that artery the effect of the ischaemia on the conducting system could be severe enough, to result in cardiac arrest. Hence incidence of the same coronary artery supplying both SA and AV nodal tissues was ...
... When both the nodal tissues are irrigated by the same coronary artery, in case of occlusion of that artery the effect of the ischaemia on the conducting system could be severe enough, to result in cardiac arrest. Hence incidence of the same coronary artery supplying both SA and AV nodal tissues was ...
Stretch-mediated cardiac hypertrophy and extracellular matrix
... are, in the Netherlands, responsible for approximately 30% of all deaths2. Heart failure accounts for 16% of all cardiac deaths3. Heart failure develops secondary to cardiac overload. This overload may originate from myocardial infarction, valvular disease or chronically increased blood pressure4. C ...
... are, in the Netherlands, responsible for approximately 30% of all deaths2. Heart failure accounts for 16% of all cardiac deaths3. Heart failure develops secondary to cardiac overload. This overload may originate from myocardial infarction, valvular disease or chronically increased blood pressure4. C ...
spheroidal bodies in the junctional sarcoplasmic reticulum of lizard
... mal was decapitated and thoracotomized, and fixative solution was injected directly into the beating heart (heart rates ranged from 40 to 140 beats/min) . The fixative consisted of 2 .6% glutaraldehyde in 0.05 M sodium cacodylate buffer (pH 7 .4) with 9% (wt/vol) sucrose added . Small pieces of vent ...
... mal was decapitated and thoracotomized, and fixative solution was injected directly into the beating heart (heart rates ranged from 40 to 140 beats/min) . The fixative consisted of 2 .6% glutaraldehyde in 0.05 M sodium cacodylate buffer (pH 7 .4) with 9% (wt/vol) sucrose added . Small pieces of vent ...
Introduction: Left ventricular (LV) twist and untwisting rate (LV twist
... at rest and during the last 3 minutes of each exercise stage. Speckle tracking technology was used post-hoc to quantify LV twist mechanics. Results: There were no significant differences between the two cohorts in HR, blood pressure, end-systolicvolume (ESV), cardiac output (CO), LV twist or circumf ...
... at rest and during the last 3 minutes of each exercise stage. Speckle tracking technology was used post-hoc to quantify LV twist mechanics. Results: There were no significant differences between the two cohorts in HR, blood pressure, end-systolicvolume (ESV), cardiac output (CO), LV twist or circumf ...
Advances in Cardiovascular Imaging
... of plaque response to therapy is inferred by cholesterol monitoring. However, cholesterol targets are derived based on a population5; their relationship to a single individual’s disease status is often less clear. In other disciplines such as cancer therapy or infection, imaging of treatment respons ...
... of plaque response to therapy is inferred by cholesterol monitoring. However, cholesterol targets are derived based on a population5; their relationship to a single individual’s disease status is often less clear. In other disciplines such as cancer therapy or infection, imaging of treatment respons ...
THE ACTION OF MAGNESIUM ON THE HEART
... For an adequate explanation of this final arrest it is necessary to assume a more direct toxic action of magnesium on the myocardium itself." Bernstein and Simkin (1939) observed only minor changes in the human cardiogram following the intravenous injection of 10 to 20 c.c. of a 10 per cent solution ...
... For an adequate explanation of this final arrest it is necessary to assume a more direct toxic action of magnesium on the myocardium itself." Bernstein and Simkin (1939) observed only minor changes in the human cardiogram following the intravenous injection of 10 to 20 c.c. of a 10 per cent solution ...
Advances in Arrhythmia and Electrophysiology
... over the cardiac silhouette, where there is no interposed lung tissue (as in humans). The distance from the external skin of a 20-kg swine to the myocardium is approximately 2 cm. High-speed video has shown penetration of a 40-mph lacrosse ball into the thoracic cavity averages 3.7⫾0.7 cm in a 20-kg ...
... over the cardiac silhouette, where there is no interposed lung tissue (as in humans). The distance from the external skin of a 20-kg swine to the myocardium is approximately 2 cm. High-speed video has shown penetration of a 40-mph lacrosse ball into the thoracic cavity averages 3.7⫾0.7 cm in a 20-kg ...
arteriovenous aneurysm - Archives of Disease in Childhood
... Abnormal mass of vessels on medial side. Right cerebral hemisphere, communic. with great cerebral vein, ant. callosal artery enlarged Arteriovenous malformation near pineal with rapid filling of great vein of Galen; abnormally large ? left ant. cerebral artery Branches of post. cerebral arteries int ...
... Abnormal mass of vessels on medial side. Right cerebral hemisphere, communic. with great cerebral vein, ant. callosal artery enlarged Arteriovenous malformation near pineal with rapid filling of great vein of Galen; abnormally large ? left ant. cerebral artery Branches of post. cerebral arteries int ...