July - Congenital Cardiology Today
... ventricular (pulmonary) outflow tract obstruction and complete heart block.8-10 Extensive study of the atrioventricular conduction system in corrected transposition with situs solitus patients by several investigators11-16 determined that it is abnormally positioned, coursing in the anterior aspect ...
... ventricular (pulmonary) outflow tract obstruction and complete heart block.8-10 Extensive study of the atrioventricular conduction system in corrected transposition with situs solitus patients by several investigators11-16 determined that it is abnormally positioned, coursing in the anterior aspect ...
Can atrial flutter be converted to sinus rhythm by antiarrhythmic
... vascular diseases. This is probably why in most of the studies evaluating the efficacy of antiarrhythmic drugs patients with atrial fibrillation and atrial flutter were pooled [1, 2]. In most of these studies atrial tachyarrhythmias can thus not be analysed separately. So there is little information ...
... vascular diseases. This is probably why in most of the studies evaluating the efficacy of antiarrhythmic drugs patients with atrial fibrillation and atrial flutter were pooled [1, 2]. In most of these studies atrial tachyarrhythmias can thus not be analysed separately. So there is little information ...
The Heart: Part One
... The heart is two side-by-side pumps Right side = pulmonary circuit Vessels that carry blood to and from the lungs ...
... The heart is two side-by-side pumps Right side = pulmonary circuit Vessels that carry blood to and from the lungs ...
Risk stratification for major adverse cardiac
... The endocardial and epicardial borders of the LV myocardium were manually planimetered on successive short-axis cine images at end-diastole and LVM was derived by the summation-of-the-disks method and multiplication of the myocardial muscle volume by 1.05 g/cm3. To assess LGE, all short-axis slices ...
... The endocardial and epicardial borders of the LV myocardium were manually planimetered on successive short-axis cine images at end-diastole and LVM was derived by the summation-of-the-disks method and multiplication of the myocardial muscle volume by 1.05 g/cm3. To assess LGE, all short-axis slices ...
Extra-corporeal membrane oxygenation support in cardiac
... tation for primary graft failure with severe hemodynamic instability. PGF is the leading cause of early mortality after heart transplantation. Pre-transplant recipient and donor organ characteristics are associated with the onset of PGF: increased pulmonary vascular resistances, preservation and rep ...
... tation for primary graft failure with severe hemodynamic instability. PGF is the leading cause of early mortality after heart transplantation. Pre-transplant recipient and donor organ characteristics are associated with the onset of PGF: increased pulmonary vascular resistances, preservation and rep ...
Ch. 20
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
High Arteriovenous (AV) Access Flow and Cardiac Complications Hemodialysis
... LVH, should absolutely have access flow measured. When unrecognized, many of these patients with recurring CHF will die from their access-induced heart disease, since the cause was not recognized, and only gets worse. The advent of accurate non-invasive measurement by ultrasound saline dilution has ...
... LVH, should absolutely have access flow measured. When unrecognized, many of these patients with recurring CHF will die from their access-induced heart disease, since the cause was not recognized, and only gets worse. The advent of accurate non-invasive measurement by ultrasound saline dilution has ...
Electrocardiographic patterns of magnesium
... patients resembling those of experimental magnesium-deficiency (FIGURE 6). There was a high mortality rate in children with flat, or inverted T waves, such as has been seen in severely magnesium-depleted animals. During the recovery period, elevated, sharply peaked T waves were seen.80 Examination o ...
... patients resembling those of experimental magnesium-deficiency (FIGURE 6). There was a high mortality rate in children with flat, or inverted T waves, such as has been seen in severely magnesium-depleted animals. During the recovery period, elevated, sharply peaked T waves were seen.80 Examination o ...
Heart Rate Variability for Clinicians
... Time Domain HRV Calculated from differences between successive N-N intervals rMSSD-Root mean square of successive differences of N-N intervals in ms pNN50-Percent of successive N-N differences >50 ms Referred to as “short-term” HRV and reflect parasympathetic influence on heart rate ...
... Time Domain HRV Calculated from differences between successive N-N intervals rMSSD-Root mean square of successive differences of N-N intervals in ms pNN50-Percent of successive N-N differences >50 ms Referred to as “short-term” HRV and reflect parasympathetic influence on heart rate ...
Safety of Asynchronous Ventricular Pacemaker - DGK
... This is supported by case reports about the induction of malignant arrhythmias through asynchronous stimulation. Here, the following patient groups were nearly always affected: patients with acute myocardial infarction (5, 9, 11, 18, 23) and patients with severe electrolyte disorders (6). These pati ...
... This is supported by case reports about the induction of malignant arrhythmias through asynchronous stimulation. Here, the following patient groups were nearly always affected: patients with acute myocardial infarction (5, 9, 11, 18, 23) and patients with severe electrolyte disorders (6). These pati ...
Fibrosis: a structural modulator of sinoatrial node physiology and
... FIGURE 1 | (A) Left: Drawing of the posterior human atrial anatomy from (Keith and Flack, 1907), with SAN outlined in red. Right: Histological cross section of the SAN (red outline) connected to the atria by a SACP (yellow outline). The SAN is seen to be isolated from the atria by sup-epicardial fat ...
... FIGURE 1 | (A) Left: Drawing of the posterior human atrial anatomy from (Keith and Flack, 1907), with SAN outlined in red. Right: Histological cross section of the SAN (red outline) connected to the atria by a SACP (yellow outline). The SAN is seen to be isolated from the atria by sup-epicardial fat ...
Chapter 3
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
Expert consensus document on b-adrenergic receptor blockers of Cardiology
... used for their antiischaemic, antiarryhthmic and antihypertensive properties. More recently, the benefit of adrenoceptor blockade was also established in patients with heart failure. The aim of this document is to review the rationale and clinical evidence for the use of b-adrenergic blockers in pati ...
... used for their antiischaemic, antiarryhthmic and antihypertensive properties. More recently, the benefit of adrenoceptor blockade was also established in patients with heart failure. The aim of this document is to review the rationale and clinical evidence for the use of b-adrenergic blockers in pati ...
Atrial Fibrillation Begets Heart Failure and Vice Versa
... Background—Atrial fibrillation (AF) and heart failure (HF) frequently coexist and together confer an adverse prognosis. The association of AF with HF subtypes has not been well described. We sought to examine differences in the temporal association of AF and HF with preserved versus reduced ejection ...
... Background—Atrial fibrillation (AF) and heart failure (HF) frequently coexist and together confer an adverse prognosis. The association of AF with HF subtypes has not been well described. We sought to examine differences in the temporal association of AF and HF with preserved versus reduced ejection ...
Copyright Information of the Article Published Online TITLE Role of
... AF is the most common arrhythmia in clinical practice resulting in major cardiovascular morbidity and mortality[6]. Earlier The Framingham Study and recently a study from Movahed et al[7] clearly established that DM is a powerful and independent risk factor for the development of AF. This close rela ...
... AF is the most common arrhythmia in clinical practice resulting in major cardiovascular morbidity and mortality[6]. Earlier The Framingham Study and recently a study from Movahed et al[7] clearly established that DM is a powerful and independent risk factor for the development of AF. This close rela ...
Chapter 3
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
... Histology of Cardiac Muscle • Compared to skeletal muscle fibers, cardiac muscle fibers are shorter in length, larger in diameter, and squarish rather than circular in transverse section (Figure 20.9). • They also exhibit branching (Table 4.4B). • Fibers within the networks are connected by interca ...
cardiogenic shock
... This treatment is preferable to fibrinolytic therapy in patients with cardiogenic shock, because studies have shown decreased mortality.1 Also recommended in patients who develop cardiogenic shock within 36 hours of myocardial infarction. Goal: Reperfusion of injured area and correction of underlyin ...
... This treatment is preferable to fibrinolytic therapy in patients with cardiogenic shock, because studies have shown decreased mortality.1 Also recommended in patients who develop cardiogenic shock within 36 hours of myocardial infarction. Goal: Reperfusion of injured area and correction of underlyin ...
Prevalence and characteristics of ectopic atrial tachycardia
... 1 Introduction Supraventricular tachycardias (SVTs) are common rhythm disturbances and were previously clustered together into one diagnostic category. Based on the knowledge gained from invasive electrophysiological studies, it has become possible to differentiate between the various SVT subtypes ...
... 1 Introduction Supraventricular tachycardias (SVTs) are common rhythm disturbances and were previously clustered together into one diagnostic category. Based on the knowledge gained from invasive electrophysiological studies, it has become possible to differentiate between the various SVT subtypes ...
Design of an automated peripheral resistance
... reflex and renal body fluid feedback system. Not all of these mechanisms have been included in the model. The more important pressure regulatory mechanisms are3: 1. The baroreceptor reflex pressure regulating mechanism An increase in arterial pressure excites stress receptors in the carotid sinuses ...
... reflex and renal body fluid feedback system. Not all of these mechanisms have been included in the model. The more important pressure regulatory mechanisms are3: 1. The baroreceptor reflex pressure regulating mechanism An increase in arterial pressure excites stress receptors in the carotid sinuses ...
Long-term Outcomes in Individuals With Prolonged PR
... Design, Setting, and Participants Prospective, community-based cohort including 7575 individuals from the Framingham Heart Study (mean age, 47 years; 54% women) who underwent routine 12-lead electrocardiography. The study cohort underwent prospective follow-up through 2007 from baseline examinations ...
... Design, Setting, and Participants Prospective, community-based cohort including 7575 individuals from the Framingham Heart Study (mean age, 47 years; 54% women) who underwent routine 12-lead electrocardiography. The study cohort underwent prospective follow-up through 2007 from baseline examinations ...
Atrial Fibrillation In Heart Failure
... An economic analysis of the AF-CHF trial reported that the costs of treating patients with heart failure with either a rate or rhythm control strategy were similar (€18,494 vs. €24,211).17 Acute strokes due to AF add additional costs. For example in the German health system, the cost of treating str ...
... An economic analysis of the AF-CHF trial reported that the costs of treating patients with heart failure with either a rate or rhythm control strategy were similar (€18,494 vs. €24,211).17 Acute strokes due to AF add additional costs. For example in the German health system, the cost of treating str ...
Sensitization of cardiac responses to pain in preterm infants
... blood draws to examine early changes both in physiological and behavioral responses to repeated exposure to painful stimuli in preterm infants. Methods: Heart rate and behavioral responses to three serially administered heelstick blood draws were evaluated in 22 medically stable preterm infants with ...
... blood draws to examine early changes both in physiological and behavioral responses to repeated exposure to painful stimuli in preterm infants. Methods: Heart rate and behavioral responses to three serially administered heelstick blood draws were evaluated in 22 medically stable preterm infants with ...
Sleep Apnea in Heart Failure Increases Heart Rate Variability and
... presented for stable breathing conditions. In the time domain, range NN, SDdNN, and NN50 were greater for OSA than CSA. Figure 2 shows the absolute power contribution of VLF, LF, and HF frequency bands occurring with each condition. Absolute LF and HF power were significantly greater during OSA than ...
... presented for stable breathing conditions. In the time domain, range NN, SDdNN, and NN50 were greater for OSA than CSA. Figure 2 shows the absolute power contribution of VLF, LF, and HF frequency bands occurring with each condition. Absolute LF and HF power were significantly greater during OSA than ...
Nitroglycerin increases venous return but reduces CVP: a preload
... determining factor for cardiac output. The heart can only pump out that what it receives and thus in steady state conditions, venous return equals cardiac output. Venous return is affected by three elements: right atrial pressure, resistance to venous return and mean systemic filling pressure. This ...
... determining factor for cardiac output. The heart can only pump out that what it receives and thus in steady state conditions, venous return equals cardiac output. Venous return is affected by three elements: right atrial pressure, resistance to venous return and mean systemic filling pressure. This ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.