Syncope - Royal College of Emergency Medicine
... occurring whilst supine or during exercise (note syncope occurring post exercise is almost always a simple vaso-vagal), new dyspnoea, evidence of cardiac failure, chest pain and ECG evidence of any of the following: second degree or complete heart block (refer to Bart’s electrophysiologists), abnorm ...
... occurring whilst supine or during exercise (note syncope occurring post exercise is almost always a simple vaso-vagal), new dyspnoea, evidence of cardiac failure, chest pain and ECG evidence of any of the following: second degree or complete heart block (refer to Bart’s electrophysiologists), abnorm ...
Myocardial infarction with Q waves
... acute failure of coronary circulation .In the Russian Federation annually infarction occurs in 0.20.6% of men aged 40 to 59 years (NA Mazur). In men, the older age group (60-64 g) of MI incidence is even higher, reaching 1.7% per year. Women get sick infarction in 2.5-5 times less likely to men, esp ...
... acute failure of coronary circulation .In the Russian Federation annually infarction occurs in 0.20.6% of men aged 40 to 59 years (NA Mazur). In men, the older age group (60-64 g) of MI incidence is even higher, reaching 1.7% per year. Women get sick infarction in 2.5-5 times less likely to men, esp ...
Diagnosis and Management of Common Types of
... node tissue above the bundle of His. The condition is caused by reentry phenomena or automaticity at or above the atrioventricular node, and includes atrioventricular nodal reentrant tachycardia, atrioventricular reciprocating tachycardia, and atrial tachycardia. Most persons with these tachyarrhyth ...
... node tissue above the bundle of His. The condition is caused by reentry phenomena or automaticity at or above the atrioventricular node, and includes atrioventricular nodal reentrant tachycardia, atrioventricular reciprocating tachycardia, and atrial tachycardia. Most persons with these tachyarrhyth ...
ECG Guide - Banner Health
... The patient’s heart rate reveals a great deal of information. If the rate is slow (under 60 beats per minute), we call it bradycardia. If the heart rate is fast (over 100 beats per minute), then it is called tachycardia. ECG monitors display the heart rate. When an ECG strip is printed, most printer ...
... The patient’s heart rate reveals a great deal of information. If the rate is slow (under 60 beats per minute), we call it bradycardia. If the heart rate is fast (over 100 beats per minute), then it is called tachycardia. ECG monitors display the heart rate. When an ECG strip is printed, most printer ...
Cryoablation Lesion with Atrial Arrhythmia after Fontan Operation
... • Patients with systemic ventricular dysfunction, bilateral superior venae cavae, and heterotaxy syndrome and those undergoing completion Fontan may exhibit a high incidence of these arrhythmias. • The viable extracardiac Fontan may be the operation of choice in a selected subset of patients. • Seri ...
... • Patients with systemic ventricular dysfunction, bilateral superior venae cavae, and heterotaxy syndrome and those undergoing completion Fontan may exhibit a high incidence of these arrhythmias. • The viable extracardiac Fontan may be the operation of choice in a selected subset of patients. • Seri ...
RV Electrical Activation in Heart Failure During Right, Left, and
... heart failure (HF) patients. B A C K G R O U N D RV activation during intrinsic conduction or pacing in patients with left ventricular (LV) dysfunction is unclear but may affect the prognosis. In cardiac resynchronization therapy (CRT), timed LV pacing (CRT-LV) may be superior to biventricular pacin ...
... heart failure (HF) patients. B A C K G R O U N D RV activation during intrinsic conduction or pacing in patients with left ventricular (LV) dysfunction is unclear but may affect the prognosis. In cardiac resynchronization therapy (CRT), timed LV pacing (CRT-LV) may be superior to biventricular pacin ...
are there deleterious cardiac effects of acute and chronic endurance
... relative workrates produce greater cardiac stress because they require a higher percentage of the individual’s maximal heart rate and generate more catecholamine spill over into the circulation. Increased catecholamine concentrations are arrhythmogenic. It is assumed that most exercise-related SCDs ...
... relative workrates produce greater cardiac stress because they require a higher percentage of the individual’s maximal heart rate and generate more catecholamine spill over into the circulation. Increased catecholamine concentrations are arrhythmogenic. It is assumed that most exercise-related SCDs ...
are there deleterious cardiac effects of acute and chronic endurance
... relative workrates produce greater cardiac stress because they require a higher percentage of the individual’s maximal heart rate and generate more catecholamine spill over into the circulation. Increased catecholamine concentrations are arrhythmogenic. It is assumed that most exercise-related SCDs ...
... relative workrates produce greater cardiac stress because they require a higher percentage of the individual’s maximal heart rate and generate more catecholamine spill over into the circulation. Increased catecholamine concentrations are arrhythmogenic. It is assumed that most exercise-related SCDs ...
Contractile properties of thermally acclimated trout heart
... intervals longer than that of steady-state beating. Steady-state stimulation (as given above) was interrupted for 10 different rest periods ranging from 5 s to 300 s, after which regular pacing was resumed. In atrial preparations, spontaneous beats often limited the pause durations to less than 120 ...
... intervals longer than that of steady-state beating. Steady-state stimulation (as given above) was interrupted for 10 different rest periods ranging from 5 s to 300 s, after which regular pacing was resumed. In atrial preparations, spontaneous beats often limited the pause durations to less than 120 ...
Annual Scientific Sessions
... pioneer in cardiovascular radiology at the University of California at San Francisco. These meetings became increasingly more popular and after several years I brought up the concept of establishing another Society focused on cardiovascular magnetic resonance. The response was mixed. Some were very ...
... pioneer in cardiovascular radiology at the University of California at San Francisco. These meetings became increasingly more popular and after several years I brought up the concept of establishing another Society focused on cardiovascular magnetic resonance. The response was mixed. Some were very ...
Evaluation of Diastolic Function: How Practical Is it?
... function to their heart, but abnormal diastolic function coupled with signs and symptoms of heart failure, ie, diastolic heart failure.1 If the echocardiogram comes back and the referring physicians read “normal systolic function or normal LVEF” with no mention of diastolic function, they may immedi ...
... function to their heart, but abnormal diastolic function coupled with signs and symptoms of heart failure, ie, diastolic heart failure.1 If the echocardiogram comes back and the referring physicians read “normal systolic function or normal LVEF” with no mention of diastolic function, they may immedi ...
Myosin Types and Fiber Types II. Atrial Myocardium in Cardiac Muscle.
... logically distinct light chains. Differences in enzymatic activity, including actin-activated ATPase activity, and light chain pattern between atrial and ventricular myosin were subsequently observed in different mammalian species (37, 43). The structure of atrial myosin heavy chains was also found ...
... logically distinct light chains. Differences in enzymatic activity, including actin-activated ATPase activity, and light chain pattern between atrial and ventricular myosin were subsequently observed in different mammalian species (37, 43). The structure of atrial myosin heavy chains was also found ...
Widening Indications of Pacemakers - The Association of Physicians
... In addition to overdrive pacing, there has been increasing interest in the evaluation of atrial activation as a means to prevent tachyarrhythmias. Traditionally, atrial leads were positioned in the right atrial appendage for stability. However, with the development of active fixation mechanisms, lea ...
... In addition to overdrive pacing, there has been increasing interest in the evaluation of atrial activation as a means to prevent tachyarrhythmias. Traditionally, atrial leads were positioned in the right atrial appendage for stability. However, with the development of active fixation mechanisms, lea ...
ACLS PRE-TEST June, 2011
... Question 36: A patient is in refractory ventricular fibrillation. High-quality CPR is in progress, and shocks have been given. One does of epinephrine was given after the second shock. An antiarrhythmic drug was given immediately after the third shock. What drug should the team leader request to be ...
... Question 36: A patient is in refractory ventricular fibrillation. High-quality CPR is in progress, and shocks have been given. One does of epinephrine was given after the second shock. An antiarrhythmic drug was given immediately after the third shock. What drug should the team leader request to be ...
Implantation Techniques of Leads for Left Ventricular
... kept and the TORQR is advanced to cannulate the coronary sinus (lower arrow), right panel. The guiding delivery sheath is brought in the roof of the right atrium after which the EP catheter is advanced in the floor of the right atrium and pulled up with counterclockwise torque to direct it posterior ...
... kept and the TORQR is advanced to cannulate the coronary sinus (lower arrow), right panel. The guiding delivery sheath is brought in the roof of the right atrium after which the EP catheter is advanced in the floor of the right atrium and pulled up with counterclockwise torque to direct it posterior ...
Do clinically relevant transthoracic defibrillation energies cause
... Sufficiently strong defibrillation shocks will cause temporary or permanent damage to the heart. Weak defibrillation shocks do not cause any damage to the heart but also do not defibrillate. A relevant and practical question is what range of shock energies is most likely to defibrillate while not ca ...
... Sufficiently strong defibrillation shocks will cause temporary or permanent damage to the heart. Weak defibrillation shocks do not cause any damage to the heart but also do not defibrillate. A relevant and practical question is what range of shock energies is most likely to defibrillate while not ca ...
Myosin Types and Fiber Types II. Atrial Myocardium
... logically distinct light chains. Differences in enzymatic activity, including actin-activated ATPase activity, and light chain pattern between atrial and ventricular myosin were subsequently observed in different mammalian species (37, 43). The structure of atrial myosin heavy chains was also found ...
... logically distinct light chains. Differences in enzymatic activity, including actin-activated ATPase activity, and light chain pattern between atrial and ventricular myosin were subsequently observed in different mammalian species (37, 43). The structure of atrial myosin heavy chains was also found ...
Ranolazine Reduces Remodeling of the Right Ventricle and
... ex vivo experimental settings, chronic RAN treatment reduced electrical heterogeneity (right ventricular-left ventricular action potential duration dispersion), shortened heart-rate corrected QT intervals in the right ventricle, and normalized RV dysfunction. Chronic RAN treatment also dose-dependen ...
... ex vivo experimental settings, chronic RAN treatment reduced electrical heterogeneity (right ventricular-left ventricular action potential duration dispersion), shortened heart-rate corrected QT intervals in the right ventricle, and normalized RV dysfunction. Chronic RAN treatment also dose-dependen ...
Temporary epicardial pacing after cardiac surgery
... of the pacemaker, but this must be distinguished from the upper rate limit, discussed later). This is the difference between DDI and DDD (below). The maximal rate in DDD is not the set lower rate limit; instead the ventricular pacing spikes can be delivered at a higher rate so as to ‘track’ atrial a ...
... of the pacemaker, but this must be distinguished from the upper rate limit, discussed later). This is the difference between DDI and DDD (below). The maximal rate in DDD is not the set lower rate limit; instead the ventricular pacing spikes can be delivered at a higher rate so as to ‘track’ atrial a ...
Surgical outcomes in the treatment of children with atrioventricular
... AV valves. From the clinical point of view, there are partial, intermediate, and complete forms of AV septal defects. In the partial form, there exists an ostium primum ASD. Here the AV valves are attached to the crest of the interventricular septum, and there is usually no interventricular communi ...
... AV valves. From the clinical point of view, there are partial, intermediate, and complete forms of AV septal defects. In the partial form, there exists an ostium primum ASD. Here the AV valves are attached to the crest of the interventricular septum, and there is usually no interventricular communi ...
Cardiac Failure in Children
... Diuretics have been widely used in cardiac failure in both adults and children for many years, providing rapid relief from the symptoms of fluid overload; however, the effects of diuretics on disease progression and survival have been unclear. Most patients with heart f ...
... Diuretics have been widely used in cardiac failure in both adults and children for many years, providing rapid relief from the symptoms of fluid overload; however, the effects of diuretics on disease progression and survival have been unclear. Most patients with heart f ...
Practical diastology André Y Denault, Pierre Couture CITATION
... The heart rate has to be normal because tachycardia by itself can impede filling. The use of a pacemaker will alter filling patterns particularly if only the ventricle is paced. The hemodynamic conditions have to be stable otherwise the Doppler parameters will vary significantly. Finally pericardia ...
... The heart rate has to be normal because tachycardia by itself can impede filling. The use of a pacemaker will alter filling patterns particularly if only the ventricle is paced. The hemodynamic conditions have to be stable otherwise the Doppler parameters will vary significantly. Finally pericardia ...
NIH Public Access
... (Fig. 2b,c and Supplementary Fig. 5)8,9. At looping heart tube stages, Tbx5 was broadly expressed throughout the embryonic turtle and anole hearts (Fig. 2a,d), similar to Xenopus Tbx5 (Ref 13), but unlike its early restricted expression in chick and mouse (Fig. 2b,c). In the anole, Tbx5 expression e ...
... (Fig. 2b,c and Supplementary Fig. 5)8,9. At looping heart tube stages, Tbx5 was broadly expressed throughout the embryonic turtle and anole hearts (Fig. 2a,d), similar to Xenopus Tbx5 (Ref 13), but unlike its early restricted expression in chick and mouse (Fig. 2b,c). In the anole, Tbx5 expression e ...
Syncope: A Guideline for Primary Care Physicians
... The history should evaluate for certain “Red Flags.” If any of these are present, a cardiology referral is indicated. These red flags include a history of syncope during exercise (especially swimming), syncope in response to intense emotion or startle, or syncope without a prodrome (light headedness ...
... The history should evaluate for certain “Red Flags.” If any of these are present, a cardiology referral is indicated. These red flags include a history of syncope during exercise (especially swimming), syncope in response to intense emotion or startle, or syncope without a prodrome (light headedness ...
Document
... echo sequence6,7 with a temporal resolution of 13.8 ms (repetition time 5 13.8 ms, echo time 5 5.0 ms, flip angle 5 15°, bandwidth 5 650 Hz per pixel, field of view 5 400 3 300 mm and matrix 5 256 3 96).1,2 Three short axis images were acquired for the LV base, mid-ventricle and apex. The basal slice ...
... echo sequence6,7 with a temporal resolution of 13.8 ms (repetition time 5 13.8 ms, echo time 5 5.0 ms, flip angle 5 15°, bandwidth 5 650 Hz per pixel, field of view 5 400 3 300 mm and matrix 5 256 3 96).1,2 Three short axis images were acquired for the LV base, mid-ventricle and apex. The basal slice ...
Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is a primary disease of the myocardium (the muscle of the heart) in which a portion of the myocardium is hypertrophied (thickened) without any obvious cause, creating functional impairment of the cardiac muscle. It is a leading cause of sudden cardiac death in young athletes.The occurrence of hypertrophic cardiomyopathy is a significant cause of sudden unexpected cardiac death in any age group and as a cause of disabling cardiac symptoms. Younger people are likely to have a more severe form of hypertrophic cardiomyopathy.HCM is frequently asymptomatic until sudden cardiac death, and for this reason some suggest routinely screening certain populations for this disease.A cardiomyopathy is a disease that affects the muscle of the heart. With HCM, the myocytes (cardiac contractile cells) in the heart increase in size, which results in the thickening of the heart muscle. In addition, the normal alignment of muscle cells is disrupted, a phenomenon known as myocardial disarray. HCM also causes disruptions of the electrical functions of the heart. HCM is most commonly due to a mutation in one of nine sarcomeric genes that results in a mutated protein in the sarcomere, the primary component of the myocyte (the muscle cell of the heart). These are predominantly single-point missense mutations in the genes for beta-myosin heavy chain (MHC), myosin-binding protein C, cardiac troponinT, or tropomyosin. These mutations cause myofibril and myocyte structural abnormalities and possible deficiencies in force generation. Not to be confused with dilated cardiomyopathy or any other cardiomyopathy.While most literature so far focuses on European, American, and Japanese populations, HCM appears in all ethnic groups. The prevalence of HCM is about 0.2% to 0.5% of the general population.