Atrioventricular N odal Response to Retrograde Activation in Atrial
... intermediate coupling interval, the retrograde impulse will be able to reach the AV node. Therefore, in patients with AF, single premature ventricular stimuli were delivered more than approximately 200 msec before the earliest next expected spontaneous R wave and more than 400 msec after the onset o ...
... intermediate coupling interval, the retrograde impulse will be able to reach the AV node. Therefore, in patients with AF, single premature ventricular stimuli were delivered more than approximately 200 msec before the earliest next expected spontaneous R wave and more than 400 msec after the onset o ...
Clinical Implications of the Echocardiographic Evaluation of Right
... systemic right ventricles, of particular interest is the information, derived from studying strain, that in the systemic RV, as in the normal LV, circumferential predominated over longitudinal free wall shortening, the opposite of findings in the normal RV. This may represent an adaptive response to ...
... systemic right ventricles, of particular interest is the information, derived from studying strain, that in the systemic RV, as in the normal LV, circumferential predominated over longitudinal free wall shortening, the opposite of findings in the normal RV. This may represent an adaptive response to ...
Two dimensional Speckle Tracking Echocardiography An overview
... insonation angle discrepencies. Strain and strain rate studies offered some hope, but this was also based on Doppler technology which was again not totally acceptable. In early 2000, the 2 D based speckle tracking concept gained prominence. This overcame the problem of Doppler velocities being used ...
... insonation angle discrepencies. Strain and strain rate studies offered some hope, but this was also based on Doppler technology which was again not totally acceptable. In early 2000, the 2 D based speckle tracking concept gained prominence. This overcame the problem of Doppler velocities being used ...
cardiac cycle
... hand it shortens with increasing heart rate. At a normal heart rate of 75 beats per minute, one cardiac cycle lasts 0.8 second. Under resting conditions, systole occupies ⅓ and diastole ⅔ of the cardiac cycle duration. At an increasing heart rate (e.g. during an intensive muscle work), the duration ...
... hand it shortens with increasing heart rate. At a normal heart rate of 75 beats per minute, one cardiac cycle lasts 0.8 second. Under resting conditions, systole occupies ⅓ and diastole ⅔ of the cardiac cycle duration. At an increasing heart rate (e.g. during an intensive muscle work), the duration ...
DR Sarcoid 30.4.15
... •Perry A, Vuitch F. Causes of death in patients with sarcoidosis. A morphologic study of 38 autopsies with clinicopathologic correlations.Arch Pathol Lab Med 1995;119:167-72. •Silverman KJ, Hutchins GM, Bulkley BH. Cardiac sarcoid: a clinicopathologic study of 84 unselected patients with systemic sa ...
... •Perry A, Vuitch F. Causes of death in patients with sarcoidosis. A morphologic study of 38 autopsies with clinicopathologic correlations.Arch Pathol Lab Med 1995;119:167-72. •Silverman KJ, Hutchins GM, Bulkley BH. Cardiac sarcoid: a clinicopathologic study of 84 unselected patients with systemic sa ...
Heart Size Evaluation of Indonesian Domestic House Cat by Motion
... Indonesian DHC had a similar IVS thickness. The slight difference in size between cats or breed may be caused by the morphologic adaptations made during training as well as other factors such as breed and body conformation (Muzzi et al. 2006). The IVS and LVW of the Indonesian DHC was thicker during ...
... Indonesian DHC had a similar IVS thickness. The slight difference in size between cats or breed may be caused by the morphologic adaptations made during training as well as other factors such as breed and body conformation (Muzzi et al. 2006). The IVS and LVW of the Indonesian DHC was thicker during ...
2 - 张丽
... of apex view. velocity of mitral valve in diastole (E), velocity of mitral valve in end-diastole (A), deceleration time of the E wave velocity (DcT), and isovolumic relaxation time (IVRT) were measured by pulse wave Doppler. The biplane Simpson’s method was used to measure left ventricular eject fra ...
... of apex view. velocity of mitral valve in diastole (E), velocity of mitral valve in end-diastole (A), deceleration time of the E wave velocity (DcT), and isovolumic relaxation time (IVRT) were measured by pulse wave Doppler. The biplane Simpson’s method was used to measure left ventricular eject fra ...
Prevalence of Left Ventricular Regional Dysfunction in
... Methods and Results—The study population included 21 patients with suspected ARVD who underwent evaluation with MRI including tagging. Eleven healthy volunteers served as control subjects. Peak systolic regional circumferential strain (Ecc, %) was calculated by harmonic phase from tagged MRI based o ...
... Methods and Results—The study population included 21 patients with suspected ARVD who underwent evaluation with MRI including tagging. Eleven healthy volunteers served as control subjects. Peak systolic regional circumferential strain (Ecc, %) was calculated by harmonic phase from tagged MRI based o ...
A tracing of the electrical activity of the heart is called a/an . 6. What
... A) The ventricle needs to pressurize the blood to close the aortic valve. B) Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood. C) The bicuspid valve needs time to shut before the ventricle can eject blood. D) Aortic pressure is higher than ventricular pressure ...
... A) The ventricle needs to pressurize the blood to close the aortic valve. B) Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood. C) The bicuspid valve needs time to shut before the ventricle can eject blood. D) Aortic pressure is higher than ventricular pressure ...
Cardiac Amyloidosis
... • Able to aggregate into insoluble amyloid fibers depositing into variety of tissues • Familial form from mutated or variant TTR • Wild type, sporadic, nongenetic due to misaggregation of wild-type transthyretin (SSA) ...
... • Able to aggregate into insoluble amyloid fibers depositing into variety of tissues • Familial form from mutated or variant TTR • Wild type, sporadic, nongenetic due to misaggregation of wild-type transthyretin (SSA) ...
Case report: acute inferior myocardial infarction with single
... right-sided chest lead V4R to check any right ventricular involvement since the treatment was different. Anderson et al evaluated this ECG feature and published their data in American Heart Journal in 1989.6 They found that both the positive predictive value and specificity were higher in right-side ...
... right-sided chest lead V4R to check any right ventricular involvement since the treatment was different. Anderson et al evaluated this ECG feature and published their data in American Heart Journal in 1989.6 They found that both the positive predictive value and specificity were higher in right-side ...
High-tension electrical injury to the heart as assessed by
... evidence of severe cardiac abnormality in the conventional test, radionuclide myocardial imaging detects significant myocardial damage due to electrical injury. Myocardial perfusion defects and/or decreased accumulation of radioisotopes were seen primarily in areas extending from the anterior wall t ...
... evidence of severe cardiac abnormality in the conventional test, radionuclide myocardial imaging detects significant myocardial damage due to electrical injury. Myocardial perfusion defects and/or decreased accumulation of radioisotopes were seen primarily in areas extending from the anterior wall t ...
Left Ventricular Remodeling in Heart Failure
... From the Cardiovascular Center, Tufts Medical Center and Tufts University School of Medicine, Boston, Massachusetts. Dr. Konstam has received research support and/or is a consultant for Otsuka, Merck, and Pfizer. Dr. Udelson has received research support and/or is a consultant for Otsuka, Merck, Pfi ...
... From the Cardiovascular Center, Tufts Medical Center and Tufts University School of Medicine, Boston, Massachusetts. Dr. Konstam has received research support and/or is a consultant for Otsuka, Merck, and Pfizer. Dr. Udelson has received research support and/or is a consultant for Otsuka, Merck, Pfi ...
Contained myocardial rupture: a variant linking complete and
... yocardial rupture is an uncommon complication of myocardial infarction, often with devastating haemodynamic consequences. After cardiogenic shock, it is the leading cause of in-hospital mortality after myocardial infarction.1 Although rupture is usually fatal, some patients may survive. Perdigao et ...
... yocardial rupture is an uncommon complication of myocardial infarction, often with devastating haemodynamic consequences. After cardiogenic shock, it is the leading cause of in-hospital mortality after myocardial infarction.1 Although rupture is usually fatal, some patients may survive. Perdigao et ...
Traumatic ventricular septal defect in a 4-year
... and fractures of the extremities. As with congenital VSD, pansystolic murmurs are auscultated at the left sternal border, and chest radiography may be normal or show only mild cardiomegaly or pulmonary edema7). Cardiac enzymes lack the sensitivity or specificity for the diagnosis of cardiac injury, ...
... and fractures of the extremities. As with congenital VSD, pansystolic murmurs are auscultated at the left sternal border, and chest radiography may be normal or show only mild cardiomegaly or pulmonary edema7). Cardiac enzymes lack the sensitivity or specificity for the diagnosis of cardiac injury, ...
Normal age-related changes in left ventricular function: Role of
... Results: Univariate correlations established that the 4 principal age-related changes in the left ventricular function were: 1) diastolic function: E/A ratio (r: − 0.61, p b 0.00001); 2) global systolic function: cardiac output (r: −0.49, p b 0.00001), 3) structure: end-diastolic volume index (r: −0 ...
... Results: Univariate correlations established that the 4 principal age-related changes in the left ventricular function were: 1) diastolic function: E/A ratio (r: − 0.61, p b 0.00001); 2) global systolic function: cardiac output (r: −0.49, p b 0.00001), 3) structure: end-diastolic volume index (r: −0 ...
The Evaluation and Management of Electrical Storm
... ischemia, electrolyte imbalances, or other causative factors. Amiodarone and β-blockers, especially propranolol, effectively resolve arrhythmias in most patients. Nonpharmacologic treatment, including radiofrequency ablation, can control electrical storm in drug-refractory patients. Patients who hav ...
... ischemia, electrolyte imbalances, or other causative factors. Amiodarone and β-blockers, especially propranolol, effectively resolve arrhythmias in most patients. Nonpharmacologic treatment, including radiofrequency ablation, can control electrical storm in drug-refractory patients. Patients who hav ...
Left ventricular dysfunction
... commensurate with the requirements of the metabolizing tissues. [1] • 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] ...
... commensurate with the requirements of the metabolizing tissues. [1] • 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] ...
Epicardial Fat Volume in Patients With COPD and Cor Pulmonale
... inflammation is discriminated by oxidative stress, activated inflammatory cells and cytokines and an increase of plasma levels of acute phase proteins. In the meantime, an imbalance between oxidant-antioxidant status could be observed (15). All of these metabolic processes could be effective on EFT. ...
... inflammation is discriminated by oxidative stress, activated inflammatory cells and cytokines and an increase of plasma levels of acute phase proteins. In the meantime, an imbalance between oxidant-antioxidant status could be observed (15). All of these metabolic processes could be effective on EFT. ...
An MRI Comparison of Quantitative Left Ventricular Structure
... together with an echocardiography report confirming an EF of 40 percent or lower; (ii) LVH cohort - only those individuals with a normal blood pressure according to current recommendations [3], and clinically diagnosed LVH from echocardiography; (iii) PMI cohort – only those individuals who had expe ...
... together with an echocardiography report confirming an EF of 40 percent or lower; (ii) LVH cohort - only those individuals with a normal blood pressure according to current recommendations [3], and clinically diagnosed LVH from echocardiography; (iii) PMI cohort – only those individuals who had expe ...
Frequent Premature Ventricular Contractions in
... The second Soyuz launched from the Baikonur CosAV node, and His-Purkinje functions. There was no evimodrome in March 2009 and landed in Kazakhstan 13 d dence of a bypass tract. Isolated monomorphic premalater. There were no symptoms from PVCs and a 5-min ture ventricular contractions were noted at b ...
... The second Soyuz launched from the Baikonur CosAV node, and His-Purkinje functions. There was no evimodrome in March 2009 and landed in Kazakhstan 13 d dence of a bypass tract. Isolated monomorphic premalater. There were no symptoms from PVCs and a 5-min ture ventricular contractions were noted at b ...
Dronedarone for Maintenance of Sinus Rhythm in Atrial Fibrillation
... sex and at least 21 years of age, had had at least one episode of atrial fibrillation (as seen on electrocardiography) in the preceding 3 months, and were in sinus rhythm for at least 1 hour before randomization. Excluded from the study were patients with permanent atrial fibrillation (i.e., a durat ...
... sex and at least 21 years of age, had had at least one episode of atrial fibrillation (as seen on electrocardiography) in the preceding 3 months, and were in sinus rhythm for at least 1 hour before randomization. Excluded from the study were patients with permanent atrial fibrillation (i.e., a durat ...
ECG interpretations good
... independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
... independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
ECG interpretations
... independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
... independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute. ...
Ablation of the Epicardial Substrate in the Right Ventricular Outflow
... was detected at the control 24-hour Holter monitoring. An ajmaline test performed with the previously described protocol and the ECG placed at high precordial leads at 18 months after ablation (Fig. 1). His resting ECG showed a type II pattern, which did not change after administration of ajmaline, ...
... was detected at the control 24-hour Holter monitoring. An ajmaline test performed with the previously described protocol and the ECG placed at high precordial leads at 18 months after ablation (Fig. 1). His resting ECG showed a type II pattern, which did not change after administration of ajmaline, ...
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.