Temporary epicardial pacing after cardiac surgery
... the pacemaker rate reliably exceeds the endogenous rate. If this is the case, the pacemaker spike should always occur before any endogenous impulse would have been generated. Indications • Bradycardia with intact AV node conduction, in situations where synchronous modes are contra-indicated. This ra ...
... the pacemaker rate reliably exceeds the endogenous rate. If this is the case, the pacemaker spike should always occur before any endogenous impulse would have been generated. Indications • Bradycardia with intact AV node conduction, in situations where synchronous modes are contra-indicated. This ra ...
Chapter 13 The Heart and Heart Disease
... beats/min) – Tachycardia—rapid heart rate (more than 100 beats/min) – Sinus dysrhythmia—variation in heart rate during breathing cycle – Premature contraction (extrasystole)—contraction that occurs sooner than expected in a normal rhythm – Fibrillation—condition in which cardiac muscle fibers are “o ...
... beats/min) – Tachycardia—rapid heart rate (more than 100 beats/min) – Sinus dysrhythmia—variation in heart rate during breathing cycle – Premature contraction (extrasystole)—contraction that occurs sooner than expected in a normal rhythm – Fibrillation—condition in which cardiac muscle fibers are “o ...
Chapter 13 The Heart and Heart Disease
... beats/min) – Tachycardia—rapid heart rate (more than 100 beats/min) – Sinus dysrhythmia—variation in heart rate during breathing cycle – Premature contraction (extrasystole)—contraction that occurs sooner than expected in a normal rhythm – Fibrillation—condition in which cardiac muscle fibers are “o ...
... beats/min) – Tachycardia—rapid heart rate (more than 100 beats/min) – Sinus dysrhythmia—variation in heart rate during breathing cycle – Premature contraction (extrasystole)—contraction that occurs sooner than expected in a normal rhythm – Fibrillation—condition in which cardiac muscle fibers are “o ...
UvA-DARE (Digital Academic Repository)
... The reader is encouraged to read the results along with the interactive 3D-PDF files located on the supplemental mini disc. 2 days of development - stage 12 (Figure 3) Expression of Cx40 at the venous pole of the heart was first observed at stage 12, in the myocardium that laid bilaterally from the ...
... The reader is encouraged to read the results along with the interactive 3D-PDF files located on the supplemental mini disc. 2 days of development - stage 12 (Figure 3) Expression of Cx40 at the venous pole of the heart was first observed at stage 12, in the myocardium that laid bilaterally from the ...
ISOPROTERENOL TOXICITY INDUCED ECG ALTERATIONS IN WISTAR RATS: ROLE OF
... (CVD). Its toll will increase to 25 million people by 2030 mainly from heart diseases such as myocardial infarction (MI) and stroke [1] . MI demonstrated as heart disease occurs as an oxygen imbalance between blood supply and myocardial demand which can be evaluated by electrocardiography (ECG) [2, ...
... (CVD). Its toll will increase to 25 million people by 2030 mainly from heart diseases such as myocardial infarction (MI) and stroke [1] . MI demonstrated as heart disease occurs as an oxygen imbalance between blood supply and myocardial demand which can be evaluated by electrocardiography (ECG) [2, ...
European Heart Journal: Acute Cardiovascular Care
... Other cases of RA are due to incomplete revascularization, as observed in patients with multi-vessel coronary disease treated with PCI according to the SYNTAX trial results,30 in this case, RA occurring within 30 days after PCI.19,29 Data from the ARTS study show that revascularization was incomplet ...
... Other cases of RA are due to incomplete revascularization, as observed in patients with multi-vessel coronary disease treated with PCI according to the SYNTAX trial results,30 in this case, RA occurring within 30 days after PCI.19,29 Data from the ARTS study show that revascularization was incomplet ...
Notes CSANZ Indigenous Cardiovascular Health Conference 2009
... angiographic severity of coronary artery disease in patients with stable CHD. (20,21) However in one study there was no correlation with levels of hsTnT and extent of angiographic disease, but there was a correlation with calcium scoring, and with the composition of coronary plaques as assessed by C ...
... angiographic severity of coronary artery disease in patients with stable CHD. (20,21) However in one study there was no correlation with levels of hsTnT and extent of angiographic disease, but there was a correlation with calcium scoring, and with the composition of coronary plaques as assessed by C ...
Rediscovering Heart Failure Burden Report
... At the same time, the definition of heart failure has evolved and this has provided an extra dimension to the burden it imposes; even if the therapeutic options for affected individuals with so-called heart failure with preserved ejection fraction or diastolic heart failure is limited. We would emph ...
... At the same time, the definition of heart failure has evolved and this has provided an extra dimension to the burden it imposes; even if the therapeutic options for affected individuals with so-called heart failure with preserved ejection fraction or diastolic heart failure is limited. We would emph ...
Aortic Arch Aneurysm Complicated with Coronary Artery Disease
... AAR necessitating cerebral protection is an evolving surgical procedure in this decade. Improved surgical outcome, decreased morbidity and mortality has been reported recently using hypothermic circulatory arrest (HCA),2–5) HCA added with retrograde cerebral perfusion (RCP),6,7) and selective cerebr ...
... AAR necessitating cerebral protection is an evolving surgical procedure in this decade. Improved surgical outcome, decreased morbidity and mortality has been reported recently using hypothermic circulatory arrest (HCA),2–5) HCA added with retrograde cerebral perfusion (RCP),6,7) and selective cerebr ...
Bridging the quality gap: Heart failure
... 900,000 people in the UK. In 2008, 10,000 deaths were attributed to it. Heart failure creates a significant burden, both in terms of compromising patients’ quality of life and economically as, every year, it costs the NHS approximately 1–2% of its annual budget – around £625 million. This chartbook ...
... 900,000 people in the UK. In 2008, 10,000 deaths were attributed to it. Heart failure creates a significant burden, both in terms of compromising patients’ quality of life and economically as, every year, it costs the NHS approximately 1–2% of its annual budget – around £625 million. This chartbook ...
Pacing Therapies for Heart Failure (PDF Available)
... atria and the ventricles. Electrical activation proceeds from the right atrium, through the AV node to the His-Purkinje system, and then to the ventricles. The His-Purkinje system comprises myocardial cells that are specialized for rapid conduction. Its anatomic components are (in order of activatio ...
... atria and the ventricles. Electrical activation proceeds from the right atrium, through the AV node to the His-Purkinje system, and then to the ventricles. The His-Purkinje system comprises myocardial cells that are specialized for rapid conduction. Its anatomic components are (in order of activatio ...
The diagnosis of silent myocardial ischemia. Motion
... sion imaging using morphing of the left ventricle is reconstructed with a matrix of 64×64. To determine whether the subject examined moved during the examination, a lm display and sonogram is used. Motion correction software with reacquisition is used to correct the image when necessary.In a prototy ...
... sion imaging using morphing of the left ventricle is reconstructed with a matrix of 64×64. To determine whether the subject examined moved during the examination, a lm display and sonogram is used. Motion correction software with reacquisition is used to correct the image when necessary.In a prototy ...
The Effect of Intensified Low Density Lipoprotein Cholesterol
... patients with stable angina showed that a significant positive correlation was identified between the percentage reduction in LDL-C during the first 3 months after coronary revascularization and the time until recurrence of cardiovascular events.23 However, no prior publication compared the outcomes ...
... patients with stable angina showed that a significant positive correlation was identified between the percentage reduction in LDL-C during the first 3 months after coronary revascularization and the time until recurrence of cardiovascular events.23 However, no prior publication compared the outcomes ...
Metabolic Response during Impending Myocardial
... FFA when compared with that of glucose and pyruvate and with myocardial oxygen consumption despite reduced coronary flow.24 This relatively larger uptake of FFA is reflected in an increase in the oxygenextraction ratio for FFA from 77% in the control period to 101% during ischemia and a decrease in ...
... FFA when compared with that of glucose and pyruvate and with myocardial oxygen consumption despite reduced coronary flow.24 This relatively larger uptake of FFA is reflected in an increase in the oxygenextraction ratio for FFA from 77% in the control period to 101% during ischemia and a decrease in ...
Arrythmia 411
... • No atrial activity conducts to the ventricles • AV dissociation is present. The atria and ventricles are controlled by independent pacemakers. • Ventricular focus is usually located just below the site of block. • Higher sites are more stable with a more faster escape rate. Tehran Arrhythmia Cente ...
... • No atrial activity conducts to the ventricles • AV dissociation is present. The atria and ventricles are controlled by independent pacemakers. • Ventricular focus is usually located just below the site of block. • Higher sites are more stable with a more faster escape rate. Tehran Arrhythmia Cente ...
Coronary Computed Tomography Angiography for the Diagnosis of
... in patients with any CAD versus 0% in those with normal coronary arteries [6]. A study of 1138 patients who underwent MDCT and a mean follow-up of 15 months found that patients with absent or mild CAD had a 99.7% survival rate, whereas patients with moderate or severe CAD had an 85% survival rate [7 ...
... in patients with any CAD versus 0% in those with normal coronary arteries [6]. A study of 1138 patients who underwent MDCT and a mean follow-up of 15 months found that patients with absent or mild CAD had a 99.7% survival rate, whereas patients with moderate or severe CAD had an 85% survival rate [7 ...
CARDIAC AND CORONARY ARTERY ANATOMY NO DISCLOSURES
... A rare congenital defect that represents only 0.250.25-0.5% of all congenital cardiac defects. Usually an isolated defect, but can be associated with other anomalies such as ASD, VSD and aortic coarctation in approximately 5% of cases. ...
... A rare congenital defect that represents only 0.250.25-0.5% of all congenital cardiac defects. Usually an isolated defect, but can be associated with other anomalies such as ASD, VSD and aortic coarctation in approximately 5% of cases. ...
Advances in Arrhythmia and Electrophysiology
... cycle. This polymorphic ventricular tachycardia was identical in morphology to the initiation of ventricular fibrillation; however, it only continued for up to 10 beats. If the polymorphic ventricular tachycardia continued beyond 10 beats, it degenerated into ventricular fibrillation. Heart block is ...
... cycle. This polymorphic ventricular tachycardia was identical in morphology to the initiation of ventricular fibrillation; however, it only continued for up to 10 beats. If the polymorphic ventricular tachycardia continued beyond 10 beats, it degenerated into ventricular fibrillation. Heart block is ...
Fluid Overload: Diagnosis and Management
... still not clear and remains debated. It is well known that cardiac mass is increased in patients with HF. This appears to be the result of a combination of reactive fibrosis and myocyte hypertrophy, along with altered cytoskeletal structure within the cardiomyocyte [8]. The abnormal growth of the he ...
... still not clear and remains debated. It is well known that cardiac mass is increased in patients with HF. This appears to be the result of a combination of reactive fibrosis and myocyte hypertrophy, along with altered cytoskeletal structure within the cardiomyocyte [8]. The abnormal growth of the he ...
morphological and immunohistochemical patterns of the intrinsic
... The intrinsic cardiac nervous system plays a crucial role in the regulation of heart rate, atrioventricular nodal conduction, and inotropism of atria and ventricles (Baumgart and Heusch, 1995; Cifelli et al., 2008; Feigl, 1998; Gorman et al., 2000; Randall et al., 2003; Tsuboi et al., 2000). Intrins ...
... The intrinsic cardiac nervous system plays a crucial role in the regulation of heart rate, atrioventricular nodal conduction, and inotropism of atria and ventricles (Baumgart and Heusch, 1995; Cifelli et al., 2008; Feigl, 1998; Gorman et al., 2000; Randall et al., 2003; Tsuboi et al., 2000). Intrins ...
Is there a role for sodium bicarbonate in treating lactic acidosis from
... In the intracellular compartment, the high CO2 concentration will drive this same equation in reverse and generate intracellular Hþ (Fig. 1 [10]). Thus, bicarbonate administration will cause intracellular acidosis unless PCO2 can be controlled by increased ventilation. One ampule of bicarbonate full ...
... In the intracellular compartment, the high CO2 concentration will drive this same equation in reverse and generate intracellular Hþ (Fig. 1 [10]). Thus, bicarbonate administration will cause intracellular acidosis unless PCO2 can be controlled by increased ventilation. One ampule of bicarbonate full ...
Left Ventricular Mass in Normal Children and its
... Dai et al., 2009). Bonatto et al. (2006) reported that for normal children there is no difference whether they correlate the values of cardiac measurements assessed by echocardiography with age, weight, height or BSA. Epstein et al. suggested that plotting the echocardiographic measurements against ...
... Dai et al., 2009). Bonatto et al. (2006) reported that for normal children there is no difference whether they correlate the values of cardiac measurements assessed by echocardiography with age, weight, height or BSA. Epstein et al. suggested that plotting the echocardiographic measurements against ...
Transmural heterogeneity of diffusion anisotropy in the - AJP
... into single scalar indexes for easier quantification of the degree of diffusion anisotropy, are generally considered to reflect the underlying cellular composition (e.g., white matter myelination) and organization (cell packing density) (3). Besides in vivo studies in humans (13, 49), DTI has been u ...
... into single scalar indexes for easier quantification of the degree of diffusion anisotropy, are generally considered to reflect the underlying cellular composition (e.g., white matter myelination) and organization (cell packing density) (3). Besides in vivo studies in humans (13, 49), DTI has been u ...
Impact of ejection on magnitude and time course of ventricular
... affect the time course of change of left ventricular pressure (LVP) throughout the cardiac cycle, with particular emphasis on revealing specific limitations in the time-varying elastance modelof ventricular dynamics. Studieswere performedin eight isolated canine hearts ejecting into a simulated wind ...
... affect the time course of change of left ventricular pressure (LVP) throughout the cardiac cycle, with particular emphasis on revealing specific limitations in the time-varying elastance modelof ventricular dynamics. Studieswere performedin eight isolated canine hearts ejecting into a simulated wind ...
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.