Atrioventricular Conduction
... blocked in the A-V node (proximal to the bundle of His). The partial penetration of this premature beat (concealed) prolongs the refractory period of the A-V node and causes prolongation of the P-R interval of the next sinus beat, which measures 0.23 sec. The His bundle electrogram recording localiz ...
... blocked in the A-V node (proximal to the bundle of His). The partial penetration of this premature beat (concealed) prolongs the refractory period of the A-V node and causes prolongation of the P-R interval of the next sinus beat, which measures 0.23 sec. The His bundle electrogram recording localiz ...
Medic One/Emergency Medical Services
... ETCO2 – carbon dioxide content of air measured at the end of exhalation impedence threshold device (ITD) – valve that prevents air from entering lungs during the decompression phase of CPR; aka ResQ POD inclusion/exclusion criteria – decision list to determine whether a victim of cardiac arrest meet ...
... ETCO2 – carbon dioxide content of air measured at the end of exhalation impedence threshold device (ITD) – valve that prevents air from entering lungs during the decompression phase of CPR; aka ResQ POD inclusion/exclusion criteria – decision list to determine whether a victim of cardiac arrest meet ...
Reversible cardiac fibrosis and heart failure induced - HAL
... LV ejection fraction (EF) was calculated as follows: EF = (LVEDD3-LVESD3/LVEDD3 where LVEDD is the LV end diastolic diameter and LVESD is LV end systolic diameter (16). The mean velocity of circumferential fiber shortening (Vcfc) was corrected for heart rate and calculated as follows: Vcfc = SF/ETc ...
... LV ejection fraction (EF) was calculated as follows: EF = (LVEDD3-LVESD3/LVEDD3 where LVEDD is the LV end diastolic diameter and LVESD is LV end systolic diameter (16). The mean velocity of circumferential fiber shortening (Vcfc) was corrected for heart rate and calculated as follows: Vcfc = SF/ETc ...
understanding your heart valve
... mechanical valve replacement patients and sometimes to tissue valve patients. It is used to prevent blood clots, which can be a serious health risk. The need for anticoagulation medication is usually minimal with tissue valves such as a Mosaic® valve. Therefore, a Mosaic valve may be especially usef ...
... mechanical valve replacement patients and sometimes to tissue valve patients. It is used to prevent blood clots, which can be a serious health risk. The need for anticoagulation medication is usually minimal with tissue valves such as a Mosaic® valve. Therefore, a Mosaic valve may be especially usef ...
Understanding Atrial Fibrillation/ Atrial Flutter (AF/AFL)
... and as seen in clinical studies, the half-life of dofetilide is longer in patients with lower creatinine clearances. Because increase in QT interval and the risk of ventricular arrhythmias are directly related to plasma concentrations of dofetilide, dosage adjustment based on ...
... and as seen in clinical studies, the half-life of dofetilide is longer in patients with lower creatinine clearances. Because increase in QT interval and the risk of ventricular arrhythmias are directly related to plasma concentrations of dofetilide, dosage adjustment based on ...
Integrated analysis of atrioventricular interactions in - AJP
... atrioventricular interaction in operated patients with tetralogy of Fallot (TOF). Twenty patients who had undergone surgical repair of TOF and seven controls were investigated. Patients had residual pulmonary but no major tricuspid valve insufficiency. Atrial and ventricular strain rates were obtain ...
... atrioventricular interaction in operated patients with tetralogy of Fallot (TOF). Twenty patients who had undergone surgical repair of TOF and seven controls were investigated. Patients had residual pulmonary but no major tricuspid valve insufficiency. Atrial and ventricular strain rates were obtain ...
1 - JACC
... in the human setting (after primary intervention or thrombolytic therapy). Post-conditioning (PC), consisting of brief episodes of ischemia-reperfusion applied after sustained ischemia and before permanent reperfusion, provides gradual early reperfusion that is cardioprotective. In contrast to class ...
... in the human setting (after primary intervention or thrombolytic therapy). Post-conditioning (PC), consisting of brief episodes of ischemia-reperfusion applied after sustained ischemia and before permanent reperfusion, provides gradual early reperfusion that is cardioprotective. In contrast to class ...
PDF
... caused shrinkage. Cyclic swelling and shrinking could also be repeated at least twice by alternating DW and 0-1 M-NaCl (Fig. 2C-E). It is important to point out that the shape of the heart after shrinking was very similar to that of the freshly dissected heart (Fig. 2A, D). If, following incubation ...
... caused shrinkage. Cyclic swelling and shrinking could also be repeated at least twice by alternating DW and 0-1 M-NaCl (Fig. 2C-E). It is important to point out that the shape of the heart after shrinking was very similar to that of the freshly dissected heart (Fig. 2A, D). If, following incubation ...
Evidence of Time-Varying Myocardial Contribution by In Vivo
... both of them are significant, which makes it more appropriate to label the measured result admittance, instead of conductance. If this hypothesis is sustained, the phase of total measured admittance should increase measurably with frequency, since the imaginary part of myocardium admittance would in ...
... both of them are significant, which makes it more appropriate to label the measured result admittance, instead of conductance. If this hypothesis is sustained, the phase of total measured admittance should increase measurably with frequency, since the imaginary part of myocardium admittance would in ...
Arrhythmias and EKGs
... ATP = Therapeutic intervention using standard bradycardia pacing algorithms and energy levels in an effort to bring the heart out of a reentrant tachycardia and restore its normal rhythm ...
... ATP = Therapeutic intervention using standard bradycardia pacing algorithms and energy levels in an effort to bring the heart out of a reentrant tachycardia and restore its normal rhythm ...
Induced Pressure Gradients Across Infundibular Zone of Right
... The catheter-manometer systems used have frequency responses which are uniform to between 15 and 20 cycles/sec. When three pressure pulses were recorded simultaneously and at the same sensitivities from three sites (the sinus and infundibulum of the right ventricle and the pulmonary artery) in open- ...
... The catheter-manometer systems used have frequency responses which are uniform to between 15 and 20 cycles/sec. When three pressure pulses were recorded simultaneously and at the same sensitivities from three sites (the sinus and infundibulum of the right ventricle and the pulmonary artery) in open- ...
Total Anomalous Pulmonary Venous Return in Siblings
... rare and critical congenital vascular anomaly in which the pulmonary veins drain into the right atrium or one of its venous tributaries.1)2) TAPVR is not a problem during fetal development because of the high pulmonary vascular resistance and shunting blood flow through the foramen ovale.2) However, ...
... rare and critical congenital vascular anomaly in which the pulmonary veins drain into the right atrium or one of its venous tributaries.1)2) TAPVR is not a problem during fetal development because of the high pulmonary vascular resistance and shunting blood flow through the foramen ovale.2) However, ...
CLINICAL REVIEW Management of atrial fibrillation
... maintain sinus rhythm. To restore sinus rhythm, pharmacological or electrical cardioversion can be used, always after adequate anticoagulation. Pharmacological cardioversion can be tried with antiarrhythmic drugs, administered intravenously or orally; patients receive the treatment usually as inpati ...
... maintain sinus rhythm. To restore sinus rhythm, pharmacological or electrical cardioversion can be used, always after adequate anticoagulation. Pharmacological cardioversion can be tried with antiarrhythmic drugs, administered intravenously or orally; patients receive the treatment usually as inpati ...
2015 Heart AR - texaschildrens.org
... just for children, and Texas Children’s Pediatrics, the nation’s largest primary pediatric care network with more than 50 practices throughout the greater Houston community. The main campus of Texas Children’s Hospital is located near downtown Houston in the Texas Medical Center, the largest medical ...
... just for children, and Texas Children’s Pediatrics, the nation’s largest primary pediatric care network with more than 50 practices throughout the greater Houston community. The main campus of Texas Children’s Hospital is located near downtown Houston in the Texas Medical Center, the largest medical ...
European Association of Cardiovascular Imaging
... The cohort of long-term survivors of heart transplant is expanding, and the assessment of these patients requires specific knowledge of the surgical techniques employed to implant the donor heart, the physiology of the transplanted heart, complications of invasive tests routinely performed to detect ...
... The cohort of long-term survivors of heart transplant is expanding, and the assessment of these patients requires specific knowledge of the surgical techniques employed to implant the donor heart, the physiology of the transplanted heart, complications of invasive tests routinely performed to detect ...
Cardiac Biomechanics
... through the cardiac cycle. The ventricular walls in the normal heart are thickest at the equator and base of the left ventricle and thinnest at the left ventricular apex and right ventricular free wall. There are also variations in the principal dimensions of the left ventricle with species, age, ph ...
... through the cardiac cycle. The ventricular walls in the normal heart are thickest at the equator and base of the left ventricle and thinnest at the left ventricular apex and right ventricular free wall. There are also variations in the principal dimensions of the left ventricle with species, age, ph ...
Pathophysiological role and clinical relevance of cytokines
... β-adrenergic receptor blockers in the management of heart failure, chronic heart failure is still one of the most important causes of morbidity and mortality and has a very high frequency for readmission to hospitalization because of the aggravation of heart failure. This accounts for a significantl ...
... β-adrenergic receptor blockers in the management of heart failure, chronic heart failure is still one of the most important causes of morbidity and mortality and has a very high frequency for readmission to hospitalization because of the aggravation of heart failure. This accounts for a significantl ...
IV
... for mPrv in the SScPAH group compared to the IPAH group, while stroke volume indices were not significantly different. Analysis of the arterial system in terms of PVR and total arterial compliance showed no difference in arterial load between the two groups. On the basis of these data we conclude th ...
... for mPrv in the SScPAH group compared to the IPAH group, while stroke volume indices were not significantly different. Analysis of the arterial system in terms of PVR and total arterial compliance showed no difference in arterial load between the two groups. On the basis of these data we conclude th ...
CMS Stress Echo
... assessment of LV mass or function in that patient. Thus, not every patient with hypertension should have resting LV function assessed (Class I), but if such an assessment is relevant, echocardiography is a well-documented and accepted method by which to achieve it. The value of repeated studies in ...
... assessment of LV mass or function in that patient. Thus, not every patient with hypertension should have resting LV function assessed (Class I), but if such an assessment is relevant, echocardiography is a well-documented and accepted method by which to achieve it. The value of repeated studies in ...
coronary artery anomalies DR SANMATH
... Q wave width > 30 ms in lead I, q wave depth >3 mm in aVL and QR pattern in aVL significantly associated with ALCAPA. ...
... Q wave width > 30 ms in lead I, q wave depth >3 mm in aVL and QR pattern in aVL significantly associated with ALCAPA. ...
Cardio85-CardiacMuscleMechanicsPt3
... A larger loop means the ventricles are working more P-V work is a major requirement for oxygen Internal work is the work the heart does on itself with each heart beat such as muscle contractions and moving muscle components, such as ions in/out (Ca, Na, K). Internal work is proportional to t ...
... A larger loop means the ventricles are working more P-V work is a major requirement for oxygen Internal work is the work the heart does on itself with each heart beat such as muscle contractions and moving muscle components, such as ions in/out (Ca, Na, K). Internal work is proportional to t ...
Prenatal Diagnosis of Congenital Cardiac Anomalies: A Practical
... Figure 2. Determination of fetal orientation with a breech presentation. (a) Sagittal drawing shows the fetal rump near the maternal cervix and the fetal head near the uterine fundus. (b) Drawing of a fourchamber view of the fetal heart with the fetus in a supine position. Dao ⫽ descending aorta, ML ...
... Figure 2. Determination of fetal orientation with a breech presentation. (a) Sagittal drawing shows the fetal rump near the maternal cervix and the fetal head near the uterine fundus. (b) Drawing of a fourchamber view of the fetal heart with the fetus in a supine position. Dao ⫽ descending aorta, ML ...
Increased left ventricular twist, untwisting rates, and - AJP
... Whole body passive HS significantly elevated skin temperature from 33.8 ⫾ 1.0°C at BL to 38.8 ⫾ 0.5°C, and core body temperature increased from 37.1 ⫾ 0.3°C at BL to 38.0 ⫾ 0.5°C. Passive HS reduced (P ⬍ 0.05) RV and LV end-diastolic and end-systolic volumes and left atrial volume (Figs. 3 and 4). L ...
... Whole body passive HS significantly elevated skin temperature from 33.8 ⫾ 1.0°C at BL to 38.8 ⫾ 0.5°C, and core body temperature increased from 37.1 ⫾ 0.3°C at BL to 38.0 ⫾ 0.5°C. Passive HS reduced (P ⬍ 0.05) RV and LV end-diastolic and end-systolic volumes and left atrial volume (Figs. 3 and 4). L ...
Jump up
... methods areangioplasty, where the arteries are pushed open, and thrombolysis, where the blockage is removed using medications.[7] Non-ST elevation myocardial infarction (NSTEMI) may be managed with medication, although angioplasty may be required if the person is considered to be at high risk.[8] Pe ...
... methods areangioplasty, where the arteries are pushed open, and thrombolysis, where the blockage is removed using medications.[7] Non-ST elevation myocardial infarction (NSTEMI) may be managed with medication, although angioplasty may be required if the person is considered to be at high risk.[8] Pe ...
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.