clinical assessment of left ventricular diastolic function - Heart
... uptake of calcium into the sarcoplasmic reticulum. It has no easily definable onset, because it is simply the terminal phase of the systolic active state. Its time course is profoundly affected by events during systole, particularly the pressure load to which the myocardium has been subject.6 The mo ...
... uptake of calcium into the sarcoplasmic reticulum. It has no easily definable onset, because it is simply the terminal phase of the systolic active state. Its time course is profoundly affected by events during systole, particularly the pressure load to which the myocardium has been subject.6 The mo ...
Atrial Fibrillation: Newer Strategies in Treatment and Anticoagulation
... • A higher thromboembolic risk increases the importance of minimizing the interval without anticoagulation. • Estimate thromboembolic risk for patients with atrial fibrillation based on age and comorbidities. • If thromboembolic risk is transiently increased (eg, recent ...
... • A higher thromboembolic risk increases the importance of minimizing the interval without anticoagulation. • Estimate thromboembolic risk for patients with atrial fibrillation based on age and comorbidities. • If thromboembolic risk is transiently increased (eg, recent ...
Cardiovascular System: The Heart B
... (c) Second-degree heart block. (d) Ventricular fibrillation. These chaotic, grossly irregular ECG Some P waves are not conducted deflections are seen in acute through the AV node; hence more heart attack and electrical shock. P than QRS waves are seen. In this tracing, the ratio of P waves to QRS wa ...
... (c) Second-degree heart block. (d) Ventricular fibrillation. These chaotic, grossly irregular ECG Some P waves are not conducted deflections are seen in acute through the AV node; hence more heart attack and electrical shock. P than QRS waves are seen. In this tracing, the ratio of P waves to QRS wa ...
Myosin Types and Fiber Types in Cardiac Muscle I . Ventricular
... hormone. All ventricular muscle fibers became strongly reactive after thyroxine treatment, whereas they became unreactive or poorly reactive after propylthiouracil treatment. These findings are consistent with the existence of different ventricular isomyosins whose relative proportions can vary acco ...
... hormone. All ventricular muscle fibers became strongly reactive after thyroxine treatment, whereas they became unreactive or poorly reactive after propylthiouracil treatment. These findings are consistent with the existence of different ventricular isomyosins whose relative proportions can vary acco ...
Ventricular Assist Devices in Heart Failure: How to Support the Heart
... (beta1-antagonist) treatment, both alone and in combination, led to decreased apoptosis levels in the ischemic heart failure rat model. Remarkably, effects of the combined treatment with clenbuterol and metoprolol were additive (Xydas et al. 2006). Nevertheless, the usefulness of clenbuterol adminis ...
... (beta1-antagonist) treatment, both alone and in combination, led to decreased apoptosis levels in the ischemic heart failure rat model. Remarkably, effects of the combined treatment with clenbuterol and metoprolol were additive (Xydas et al. 2006). Nevertheless, the usefulness of clenbuterol adminis ...
Print - Circulation Research
... failure. On the one hand, myocardial catecholamine stores are diminished, and hence sympathetic stimulation is less effective in producing a positive inotropic response (21). On the other hand, whatever endogenous catecholamines are released may be less effective in generating intracellular cyclicAM ...
... failure. On the one hand, myocardial catecholamine stores are diminished, and hence sympathetic stimulation is less effective in producing a positive inotropic response (21). On the other hand, whatever endogenous catecholamines are released may be less effective in generating intracellular cyclicAM ...
2015 Exercise and the heart- the good, the bad, and the ugly
... the onset of dementia, and is as considered an antidepressant. Most of these benefits are attributable to moderate exercise, whereas athletes perform way beyond the recommended levels of physical activity and constantly push back the frontiers of human endurance. The cardiovascular adaptation for ge ...
... the onset of dementia, and is as considered an antidepressant. Most of these benefits are attributable to moderate exercise, whereas athletes perform way beyond the recommended levels of physical activity and constantly push back the frontiers of human endurance. The cardiovascular adaptation for ge ...
Print - Circulation
... To evaluate this problem in the diseased heart we simulated an LVAD in the operating room by bypassing and unloading the left ventricle with the heart-lung machine before routine open heart surgery. Right ventricular function was assessed in 12 patients with preoperative left ventricular ejection fr ...
... To evaluate this problem in the diseased heart we simulated an LVAD in the operating room by bypassing and unloading the left ventricle with the heart-lung machine before routine open heart surgery. Right ventricular function was assessed in 12 patients with preoperative left ventricular ejection fr ...
Regulated addition of new myocardial and epicardial
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
Regulated addition of new myocardial and epicardial
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
PDF
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
... such as ischemic infarction, and the resulting hypertrophy of existing muscle that occurs concomitantly with scar formation is detrimental to cardiac function. The notion that the major structural cells within such a vigorous and vital organ survive 70 to 100 years in humans without support from new ...
Basic ECG Rhythm Identification Part II Learning Objectives
... • Type II can rapidly progress to complete ...
... • Type II can rapidly progress to complete ...
Titin isoform switching is a major cardiac adaptive response in
... time, chamber dilation and elevated end-diastolic pressures lead to congestive heart failure if no intervention is sought (23, 35). However, hibernating grizzly bears tolerate extremely low heart rates without ventricular chamber dilation (30). The mechanisms that circumvent chamber dilation are not ...
... time, chamber dilation and elevated end-diastolic pressures lead to congestive heart failure if no intervention is sought (23, 35). However, hibernating grizzly bears tolerate extremely low heart rates without ventricular chamber dilation (30). The mechanisms that circumvent chamber dilation are not ...
Are Sinus Node Dysfunction and Pacemaker
... Retrospective cohort study of patients that underwent permanent pacemaker implantation at Mercy Hospital of Buffalo in one year. Demographics of sample. Indication of pacemaker , presence or absence Atrial fibrillation . If atrial fibrillation was present then categorized into two categories ...
... Retrospective cohort study of patients that underwent permanent pacemaker implantation at Mercy Hospital of Buffalo in one year. Demographics of sample. Indication of pacemaker , presence or absence Atrial fibrillation . If atrial fibrillation was present then categorized into two categories ...
Ventricular torsion and cardiac suction effect
... a radial activation spreads from the descending to the ascending band. From this point, begins a simultaneous and opposing activation of the proximal and distal ascending band. 3) The activation of the distal ascending band segment is the latest. Conclusions: The novel activation sequence of the Tor ...
... a radial activation spreads from the descending to the ascending band. From this point, begins a simultaneous and opposing activation of the proximal and distal ascending band. 3) The activation of the distal ascending band segment is the latest. Conclusions: The novel activation sequence of the Tor ...
Atrial Dissociation and Uniatrial Fibrillation
... Wenckebach' in 1906 was first to report it in man. Neither of these authors illustrated his claim with published electrocardiograms. A number of these publications invite special comment. Schrumpf3 published the first illustrative electrocardiogram; his tracing appears reasonably convincing, but Lew ...
... Wenckebach' in 1906 was first to report it in man. Neither of these authors illustrated his claim with published electrocardiograms. A number of these publications invite special comment. Schrumpf3 published the first illustrative electrocardiogram; his tracing appears reasonably convincing, but Lew ...
Arrhythmias in the Elderly: Modern Management
... The choice of the most appropriate pacing mode (AAIR, DDDR, VVIR) rests on an analysis of the findings of large prospective, randomised studies.9-13 That these included elderly people can be seen from the mean age of their patient populations (Table 2). Overall, those studies did not show any superi ...
... The choice of the most appropriate pacing mode (AAIR, DDDR, VVIR) rests on an analysis of the findings of large prospective, randomised studies.9-13 That these included elderly people can be seen from the mean age of their patient populations (Table 2). Overall, those studies did not show any superi ...
Mean Velocity of Fiber Shortening
... in two patients the left ventricular end-diastolic pressures were slightly elevated (14 and 16 mm Hg).7 A second group was composed of 22 patients who had left ventricular myocardial disease. Twelve had idiopathic cardiomyopathy, two had idiopathic left ventricular hypertrophy, five had coronary art ...
... in two patients the left ventricular end-diastolic pressures were slightly elevated (14 and 16 mm Hg).7 A second group was composed of 22 patients who had left ventricular myocardial disease. Twelve had idiopathic cardiomyopathy, two had idiopathic left ventricular hypertrophy, five had coronary art ...
ABERRANT VENTRICULAR CONDUCTION TYPES AND
... Studies emphasize the importance of HR in the genesis of ventricular arrhythmias during myocardial ischemia. In 20 dogs subjected to acute myocardial ischemia and crushing of the SA node, standard ECG leads were recorded, as well as His bundle and epicardial electrograms from the normal and ischemi ...
... Studies emphasize the importance of HR in the genesis of ventricular arrhythmias during myocardial ischemia. In 20 dogs subjected to acute myocardial ischemia and crushing of the SA node, standard ECG leads were recorded, as well as His bundle and epicardial electrograms from the normal and ischemi ...
Atrial Fibrillation and Its Association with Endocrine Disorders
... significant effect on morbidity and mortality: it is estimated that AF increases the risk of stroke by fivefold and about 15% of all patients who have stroke have AF too.1,3 The percentage of strokes attributable to AF increases from 1.5% at 50-59 years of age to 23.5% at 80-89 years of age.1 AF mos ...
... significant effect on morbidity and mortality: it is estimated that AF increases the risk of stroke by fivefold and about 15% of all patients who have stroke have AF too.1,3 The percentage of strokes attributable to AF increases from 1.5% at 50-59 years of age to 23.5% at 80-89 years of age.1 AF mos ...
Left Ventricular Assist Device Management in the ICU
... pressure, it provides up to 10 L/min flow (12–15). Other axial flow devices include Jarvik 2000, and the previously used Incor and MicroMed DeBakey (16–19). Of the centrifugal flow implantable pumps, HeartWare (HW) is the only FDA-approved device for BTT. Its wide-blade impeller with magnetic elemen ...
... pressure, it provides up to 10 L/min flow (12–15). Other axial flow devices include Jarvik 2000, and the previously used Incor and MicroMed DeBakey (16–19). Of the centrifugal flow implantable pumps, HeartWare (HW) is the only FDA-approved device for BTT. Its wide-blade impeller with magnetic elemen ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.