Natural History and Prognosis of Atrial Septal Defect
... U.S. Public Health Service. This comparison is shown in table 2. It is seen that the drop-off of the figures for patients older than 50 years in this series is not shared by normal individuals, the statistical significance of this difference being of the order of less than 1 in 1,000. In order to re ...
... U.S. Public Health Service. This comparison is shown in table 2. It is seen that the drop-off of the figures for patients older than 50 years in this series is not shared by normal individuals, the statistical significance of this difference being of the order of less than 1 in 1,000. In order to re ...
Complex inheritance for susceptibility to sudden cardiac death
... utes of occlusion also occurs in human, but it is considered likely to be with a retarded time course. It has been proposed that during phase 1a, two different mechanisms are involved in development of arrhythmias. A reentrant excitation causes VF and VT while a non-reentrant mechanism causes prema ...
... utes of occlusion also occurs in human, but it is considered likely to be with a retarded time course. It has been proposed that during phase 1a, two different mechanisms are involved in development of arrhythmias. A reentrant excitation causes VF and VT while a non-reentrant mechanism causes prema ...
The Relationship Between Congestive Heart Failure, Sleep Apnea
... perhaps mortality as well, may be worsened by the presence of sleep apnea, particularly CSA. Several investigators have postulated mechanisms of action. The occurrence of frequent episodes of oxygen desaturation and the many arousals caused by apnea may contribute to both left and right ventricular ...
... perhaps mortality as well, may be worsened by the presence of sleep apnea, particularly CSA. Several investigators have postulated mechanisms of action. The occurrence of frequent episodes of oxygen desaturation and the many arousals caused by apnea may contribute to both left and right ventricular ...
Coronary artery disease as the cause of incident heart failure in the
... coronary angiography and may have under-estimated the importance of coronary artery disease. Previous population studies from our group[2], and others[10,11], allocated aetiology mainly on the basis of clinical assessment without coronary angiography. It is often not possible to identify an aetiolog ...
... coronary angiography and may have under-estimated the importance of coronary artery disease. Previous population studies from our group[2], and others[10,11], allocated aetiology mainly on the basis of clinical assessment without coronary angiography. It is often not possible to identify an aetiolog ...
Cardiac Screening With Electrocardiography, Stress
... use of cardiac imaging studies is increasing (11–13), although reliable data are not available on the number of screening studies performed. Despite its intuitive appeal, the benefit of cardiac screening in low-risk adults has long been questioned (14, 15). For screening to be warranted, showing that ...
... use of cardiac imaging studies is increasing (11–13), although reliable data are not available on the number of screening studies performed. Despite its intuitive appeal, the benefit of cardiac screening in low-risk adults has long been questioned (14, 15). For screening to be warranted, showing that ...
Pacemaker activity in an insect heart
... aorta are driven by electrical activity generated somewhere in the main part of the heart. After sectioning at S1, the rest of the heart maintained the normal cycle of contractions, which started from the sixth and ended at the first cardiac segment. In a different preparation, after sectioning the ...
... aorta are driven by electrical activity generated somewhere in the main part of the heart. After sectioning at S1, the rest of the heart maintained the normal cycle of contractions, which started from the sixth and ended at the first cardiac segment. In a different preparation, after sectioning the ...
Selective serotonin reuptake inhibitors and cardiovascular events: A
... and their related side effects.[10] It seems that the interactive role of both cardiovascular disorders and antidepressants on triggering or inhibiting hormonal pathways, including serotonin, norepinephrine, and dopamine, may account for these effects.[11,12] One of the main drug groups commonly use ...
... and their related side effects.[10] It seems that the interactive role of both cardiovascular disorders and antidepressants on triggering or inhibiting hormonal pathways, including serotonin, norepinephrine, and dopamine, may account for these effects.[11,12] One of the main drug groups commonly use ...
HRS-004 PULSE layout_hrs.indd
... This observational cohort study will examine the appropriateness, effectiveness and safety of ICD therapy in approximately 3,500 patients who have received an ICD for the primary prevention of sudden cardiac death. For the first time, longitudinal outcomes among this patient population will be follow ...
... This observational cohort study will examine the appropriateness, effectiveness and safety of ICD therapy in approximately 3,500 patients who have received an ICD for the primary prevention of sudden cardiac death. For the first time, longitudinal outcomes among this patient population will be follow ...
BRS Physiology Cases and Problems 2nd Edition
... Therefore, the PR interval includes the P wave (atrial depolarization) and the PR segment, an isoelectric portion of the ECG that corresponds to conduction through the AV node, Because PR interval is a time, its units are given in seconds (sec) or milliseconds (msec). You may have needed to look up ...
... Therefore, the PR interval includes the P wave (atrial depolarization) and the PR segment, an isoelectric portion of the ECG that corresponds to conduction through the AV node, Because PR interval is a time, its units are given in seconds (sec) or milliseconds (msec). You may have needed to look up ...
Full-Text PDF
... has been suggested that endurance athletes present with cardiac adaptations, induced by an increased “volume” load, while power-based athletes have a cardiac phenotype shaped by a higher “pressure” load. Simplistically, endurance athletes have large eccentrically remodeled hearts—large ventricular v ...
... has been suggested that endurance athletes present with cardiac adaptations, induced by an increased “volume” load, while power-based athletes have a cardiac phenotype shaped by a higher “pressure” load. Simplistically, endurance athletes have large eccentrically remodeled hearts—large ventricular v ...
Assessing a Life of Patient Assessment
... laboratory 1.5 k away via telephone cable, the first one on 3/22, the first ...
... laboratory 1.5 k away via telephone cable, the first one on 3/22, the first ...
POST-THESIS
... chambers with thicker walls which act as the pumps to direct blood to the body3,4,5. Blood flow in the heart The heart is responsible for taking deoxygenated blood from the body, returning it to the lungs for oxygenation, then delivering the oxygenated blood to the body. To begin this process, deoxy ...
... chambers with thicker walls which act as the pumps to direct blood to the body3,4,5. Blood flow in the heart The heart is responsible for taking deoxygenated blood from the body, returning it to the lungs for oxygenation, then delivering the oxygenated blood to the body. To begin this process, deoxy ...
mechanical properties of the heart
... head rotates and extends the hinge region. Force generated by a single sarcomere is proportional to the number of actin-myosin bonds and the free energy of ATP hydrolysis. The state of actinmyosin binding following ATP hydrolysis is referred to as the rigor state, because in the absence of additiona ...
... head rotates and extends the hinge region. Force generated by a single sarcomere is proportional to the number of actin-myosin bonds and the free energy of ATP hydrolysis. The state of actinmyosin binding following ATP hydrolysis is referred to as the rigor state, because in the absence of additiona ...
Early origins of heart disease: Low birth weight and the... the insulin-like gro wth factor system in cardiac hypertrophy
... before birth is associated with left ventricular hypertrophy and an increased risk of death from heart disease later in life. 2. In fetal life, the insulin-like growth factor (IGF) system has been implicated in physiological growth of the heart, while in postnatal life IGFs can be involved in both p ...
... before birth is associated with left ventricular hypertrophy and an increased risk of death from heart disease later in life. 2. In fetal life, the insulin-like growth factor (IGF) system has been implicated in physiological growth of the heart, while in postnatal life IGFs can be involved in both p ...
Prediction of left heart filling pressure and its - Heart
... the usual fashion. Records were made daily for the first 5 days, and then whenever the clinical situation indicated its need for as long as 9 days. Since patients with pulmonary oedema are generally treated in a half-sitting position, it is important to note that these electrocardiograms were record ...
... the usual fashion. Records were made daily for the first 5 days, and then whenever the clinical situation indicated its need for as long as 9 days. Since patients with pulmonary oedema are generally treated in a half-sitting position, it is important to note that these electrocardiograms were record ...
File - Physiology At Large
... – Increases PQ segment – Increases delay between atrial and ventricular ...
... – Increases PQ segment – Increases delay between atrial and ventricular ...
february 2010 - australian resuscitation council research updates
... None. Measurements and Main Results: We studied 181 patients after cardiac arrest, of which 91% were asphyxial in etiology (vs. cardiac) and 52% occurred in-hospital. Overall survival to hospital discharge was 45%. Forty patients received therapeutic hypothermia; all were admitted during or after 20 ...
... None. Measurements and Main Results: We studied 181 patients after cardiac arrest, of which 91% were asphyxial in etiology (vs. cardiac) and 52% occurred in-hospital. Overall survival to hospital discharge was 45%. Forty patients received therapeutic hypothermia; all were admitted during or after 20 ...
DCM
... Is echo useful in selecting patients for CRT? • PROSPECT trial – did not support using echo for selecting patients for CRT ...
... Is echo useful in selecting patients for CRT? • PROSPECT trial – did not support using echo for selecting patients for CRT ...
Effects of paediatric HIV infection on electrical conduction of the heart
... We a priori included age and body mass index (BMI) as potential confounders in the association between HIV infection status and cardiac conduction. In addition to their association with HIV infection status, both variables are most likely related to cardiac conduction time, to which some association ...
... We a priori included age and body mass index (BMI) as potential confounders in the association between HIV infection status and cardiac conduction. In addition to their association with HIV infection status, both variables are most likely related to cardiac conduction time, to which some association ...
Hypoplasia of the Coronary Sinus with Coronary
... FIGURE2. An arteriogram in the left anterior oblique view reveals an irregular right coronary artery. There are dilated vascular channels within the ventriciilar septum. mixture (Ser-ap-es) once daily and clofibrate 500 mg twice daily, until the present admission. Physical examination revealed blood ...
... FIGURE2. An arteriogram in the left anterior oblique view reveals an irregular right coronary artery. There are dilated vascular channels within the ventriciilar septum. mixture (Ser-ap-es) once daily and clofibrate 500 mg twice daily, until the present admission. Physical examination revealed blood ...
Left Ventricular Mechanical Support with Impella
... However, ECMO systems have device-related disadvantages such as hemolysis, coagulation disorders, and limited device durability. Furthermore, the efficacy of ECMO has been questioned with respect to the mechanoenergetic status of the heart.4,5 Adverse effects of ECMO on a failing heart are increased ...
... However, ECMO systems have device-related disadvantages such as hemolysis, coagulation disorders, and limited device durability. Furthermore, the efficacy of ECMO has been questioned with respect to the mechanoenergetic status of the heart.4,5 Adverse effects of ECMO on a failing heart are increased ...
Physiologic risk assessment in stable ischemic heart disease
... cost containment and direct reperfusion delivery. In this respect, a survey of the European Society of Cardiology has shown that noninvasive tests are underutilized, with wide variability between different countries,1 so that several patients without significant IHD directly undergo invasive coronar ...
... cost containment and direct reperfusion delivery. In this respect, a survey of the European Society of Cardiology has shown that noninvasive tests are underutilized, with wide variability between different countries,1 so that several patients without significant IHD directly undergo invasive coronar ...
Cardiogenic Shock
... advances in treating this condition, nearly 50% of patients with cardiogenic shock still do not survive to hospital discharge. In a strict sense, cardiogenic shock develops as a result of the failure of the heart in its function as a pump, resulting in inadequate cardiac output. This failure is most ...
... advances in treating this condition, nearly 50% of patients with cardiogenic shock still do not survive to hospital discharge. In a strict sense, cardiogenic shock develops as a result of the failure of the heart in its function as a pump, resulting in inadequate cardiac output. This failure is most ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.