Angiotensin II Type 2 Receptors and Cardiac
... Abstract—The development of left ventricular hypertrophy in subjects with hypertrophic cardiomyopathy (HCM) is variable, suggesting a role for modifying factors such as angiotensin II. Angiotensin II mediates both trophic and antitrophic effects, via angiotensin II type 1 (AT1-R) and angiotensin II ...
... Abstract—The development of left ventricular hypertrophy in subjects with hypertrophic cardiomyopathy (HCM) is variable, suggesting a role for modifying factors such as angiotensin II. Angiotensin II mediates both trophic and antitrophic effects, via angiotensin II type 1 (AT1-R) and angiotensin II ...
Effects of Epinephrine on Frog Ventricle
... at a given length than the isometric tension at that length. Thus, a heart contracting with much force can reach a sufficiently small volume so that most of the tension disappears, and filling can then commence before the diastolic state is fully established. Onflow would then lead to a re-establish ...
... at a given length than the isometric tension at that length. Thus, a heart contracting with much force can reach a sufficiently small volume so that most of the tension disappears, and filling can then commence before the diastolic state is fully established. Onflow would then lead to a re-establish ...
Results of a Multicenter Retrospective Implantable Cardioverter
... years old (p ⬍ 0.05, chi-square test). In pediatric subgroup analysis, an inappropriate shock was less likely to have been received in cardiomyopathy patients (13%) compared with primary electrical disease (31%) or congenital heart disease (28%) patients (p ⬍ 0.01). Following an inappropriate shock ...
... years old (p ⬍ 0.05, chi-square test). In pediatric subgroup analysis, an inappropriate shock was less likely to have been received in cardiomyopathy patients (13%) compared with primary electrical disease (31%) or congenital heart disease (28%) patients (p ⬍ 0.01). Following an inappropriate shock ...
Audio-Visual Based Recognition of Auscultatory Heart Sounds with
... techniques (e.g., the detection/recognition of murmurs and sound tone changes within approximately one second), we have proposed an audio-visual based technique to examine and visualize heart sounds for both physicians and patients. To overcome auscultation difficulties, the technique can be used to ...
... techniques (e.g., the detection/recognition of murmurs and sound tone changes within approximately one second), we have proposed an audio-visual based technique to examine and visualize heart sounds for both physicians and patients. To overcome auscultation difficulties, the technique can be used to ...
NT-proBNP levels, as predictor of left ventricular systolic and
... Differentiating the two types of HF is important, as their long-term drug treatments are not the same. Chronic heart failure (CHF) is currently recognized as a clinical syndrome occurring not only as a result of rnechanical dysfunction of the ventricles, but also due to complex molecular, endocrine, ...
... Differentiating the two types of HF is important, as their long-term drug treatments are not the same. Chronic heart failure (CHF) is currently recognized as a clinical syndrome occurring not only as a result of rnechanical dysfunction of the ventricles, but also due to complex molecular, endocrine, ...
Cryoablation Lesion with Atrial Arrhythmia after Fontan Operation
... because of tachycardia-induced cardiomyopathy, hemodynamic compromise, & thromboembolism, causing serious health concern &financial costs. • The aims of treatment are resortation of normal sinus rhythm, normal atrial contraction & atrioventricular conduction, rate control, and prevention of thromboe ...
... because of tachycardia-induced cardiomyopathy, hemodynamic compromise, & thromboembolism, causing serious health concern &financial costs. • The aims of treatment are resortation of normal sinus rhythm, normal atrial contraction & atrioventricular conduction, rate control, and prevention of thromboe ...
Point:Counterpoint: Respiratory sinus arrhythmia is due to a central
... In healthy humans blood pressure and heart periods fluctuate at respiratory and other frequencies. The extent of these fluctuations is situation and age dependent. Although literature concurs that most of these fluctuations are reflex driven, some insist on an exemption for the respiratory oscillati ...
... In healthy humans blood pressure and heart periods fluctuate at respiratory and other frequencies. The extent of these fluctuations is situation and age dependent. Although literature concurs that most of these fluctuations are reflex driven, some insist on an exemption for the respiratory oscillati ...
Cardiac function assessed by systolic time intervals
... Systolic time intervals after bypass surgery 715 groups, on the basis of the preoperative pre-ejection phase-left ventricular ejection time ratio (PEP/ LVET). Using a cutoff ratio of 0o43, there were i8 patients below and 15 patients above this value. The I8 patients with ratios below 0o43 were cons ...
... Systolic time intervals after bypass surgery 715 groups, on the basis of the preoperative pre-ejection phase-left ventricular ejection time ratio (PEP/ LVET). Using a cutoff ratio of 0o43, there were i8 patients below and 15 patients above this value. The I8 patients with ratios below 0o43 were cons ...
Cardiac failure
... Already before manifest cardiac failure, plasma norepinephrine and atrial natriuretic factor levels are enhanced – physiological reactions merge smoothly into pathological ones ...
... Already before manifest cardiac failure, plasma norepinephrine and atrial natriuretic factor levels are enhanced – physiological reactions merge smoothly into pathological ones ...
EXPERIENCE, INSIGHTS AND TECHNIQUES FOR CARDIAC
... really matter whether the heart is beating or not, functioning or nonfunctioning. In the OPCAB mode any variance from normal functioning will need to be identified in real-time, preferably beat-to-beat, allowing the earliest possible therapeutic and procedural response. An arterial line in combinati ...
... really matter whether the heart is beating or not, functioning or nonfunctioning. In the OPCAB mode any variance from normal functioning will need to be identified in real-time, preferably beat-to-beat, allowing the earliest possible therapeutic and procedural response. An arterial line in combinati ...
Managing low cardiac output syndrome after congenital heart surgery
... Although it is understandable to presume that postoperative patients with pulmonary hypertension have active and reversible pulmonary vasoconstriction as the source of their pathophysiology, the critical care physician is obligated to explore anatomical causes of mechanical obstruction that impose a ...
... Although it is understandable to presume that postoperative patients with pulmonary hypertension have active and reversible pulmonary vasoconstriction as the source of their pathophysiology, the critical care physician is obligated to explore anatomical causes of mechanical obstruction that impose a ...
Revo MRI™ Pacing System
... system consisting of a SureScan device and two SureScan leads; patients who have previously implanted devices, or broken or intermittent leads; or patients who have a lead impedance value of < 200 Ω or > 1,500 Ω. Do not scan patients with a SureScan pacing system implanted in sites other than the le ...
... system consisting of a SureScan device and two SureScan leads; patients who have previously implanted devices, or broken or intermittent leads; or patients who have a lead impedance value of < 200 Ω or > 1,500 Ω. Do not scan patients with a SureScan pacing system implanted in sites other than the le ...
Frequency of spontaneous and inducible atrioventricular nodal
... Methods: In 68 consecutive patients referred for RFA of an idiopathic ventricular outflow tract arrhythmia, a stimulation protocol including repeated bursts of rapid atrial pacing, up to triple atrial extrastimuli during sinus rhythm and rapid ventricular pacing was performed before and after isopro ...
... Methods: In 68 consecutive patients referred for RFA of an idiopathic ventricular outflow tract arrhythmia, a stimulation protocol including repeated bursts of rapid atrial pacing, up to triple atrial extrastimuli during sinus rhythm and rapid ventricular pacing was performed before and after isopro ...
Pediatric Cardiomyopathies
... Pediatric cardiomyopathy is a rare heart condition that affects infants and children.There is a vast amount of literature on adult cardiomyopathy but not all of the information is relevant to children diagnosed with the disease. Unfortunately, there has been little research and focus on pediatric ca ...
... Pediatric cardiomyopathy is a rare heart condition that affects infants and children.There is a vast amount of literature on adult cardiomyopathy but not all of the information is relevant to children diagnosed with the disease. Unfortunately, there has been little research and focus on pediatric ca ...
Intermittent Auscultation
... Intermittent Auscultation is a method of assessing the fetal heart rate and rhythm via use of a handhand-held Doppler or Pinard stethoscope When IA is used to monitor a fetus during the intrapartum period, the fetal heart rate is determined at set intervals Today Intermittent auscultation is often b ...
... Intermittent Auscultation is a method of assessing the fetal heart rate and rhythm via use of a handhand-held Doppler or Pinard stethoscope When IA is used to monitor a fetus during the intrapartum period, the fetal heart rate is determined at set intervals Today Intermittent auscultation is often b ...
nurnal - Journal of the Royal Army Medical Corps
... would not stand a stress of exertion; and that the heart would not respond so kindly to varying conditions as in the case of nonexistence of venous pulse. I think more extended observations on different classes of healthy people will not bear out that opinion. I have had a difficulty since commencin ...
... would not stand a stress of exertion; and that the heart would not respond so kindly to varying conditions as in the case of nonexistence of venous pulse. I think more extended observations on different classes of healthy people will not bear out that opinion. I have had a difficulty since commencin ...
left ventricular thrombus in acute myocardial infarction
... Objective: To determine Left ventricular thrombus (LVT) in acute Myocardial infarction (MI) and to find out the correlation of risk factors with development of LVT. Study Design: Hospital based observational study. Place and Duration: Department of Cardiology, Liaquat University Hospital Hyderabad b ...
... Objective: To determine Left ventricular thrombus (LVT) in acute Myocardial infarction (MI) and to find out the correlation of risk factors with development of LVT. Study Design: Hospital based observational study. Place and Duration: Department of Cardiology, Liaquat University Hospital Hyderabad b ...
SCCT guidelines for performance of coronary computed
... and/or nitroglycerin should be noted. Blood oxygen saturation monitoring may be required in critically ill patients for whom CT imaging is contemplated. The following is a description of standard procedures that need to be performed before a coronary CTA. ...
... and/or nitroglycerin should be noted. Blood oxygen saturation monitoring may be required in critically ill patients for whom CT imaging is contemplated. The following is a description of standard procedures that need to be performed before a coronary CTA. ...
Prognostic Importance of Elevated Jugular Venous Pressure and S3
... to 2.17; P<0.001), the composite end point of death or hospitalization for heart failure (relative risk, 1.69; 95 percent confidence interval, 1.45 to 1.97; P< 0.001), and death from pump failure (relative risk, 1.99; 95 percent confidence interval, 1.57 to 2.52; P<0.001), but not death from arrhyth ...
... to 2.17; P<0.001), the composite end point of death or hospitalization for heart failure (relative risk, 1.69; 95 percent confidence interval, 1.45 to 1.97; P< 0.001), and death from pump failure (relative risk, 1.99; 95 percent confidence interval, 1.57 to 2.52; P<0.001), but not death from arrhyth ...
PDF - Circulation: Arrhythmia and Electrophysiology
... A total of 37 VTs were targeted for catheter ablation. All ablations were performed from the left ventricular endocardial surface with 67% (8 out of 12 animals) requiring ablations on the right ventricular side of the interventricular septum to create a transmural lesion for arrhythmias arising from ...
... A total of 37 VTs were targeted for catheter ablation. All ablations were performed from the left ventricular endocardial surface with 67% (8 out of 12 animals) requiring ablations on the right ventricular side of the interventricular septum to create a transmural lesion for arrhythmias arising from ...
The Functional Anatomy of Ventricular Contraction
... the epicardial surface. This was particularly true of pins near the base of the right ventricle. If points on opposite sides of a ventricular wall move different amounts, and in different directions, the connections between the myocardial layers must be put under tension (vide infra). The distance b ...
... the epicardial surface. This was particularly true of pins near the base of the right ventricle. If points on opposite sides of a ventricular wall move different amounts, and in different directions, the connections between the myocardial layers must be put under tension (vide infra). The distance b ...
Fetal Myocardial Thickening Measured by
... ultrasonic transducer connected to standard ultrasonic diagnostic equipment. We used an ultrasonic frequency of 3.75 MHz, with a pulse repetition interval of 222 s. The resultant real and imaginary signals of the demodulated Doppler signal were simultaneously A/ D converted with a two-channel 12-bi ...
... ultrasonic transducer connected to standard ultrasonic diagnostic equipment. We used an ultrasonic frequency of 3.75 MHz, with a pulse repetition interval of 222 s. The resultant real and imaginary signals of the demodulated Doppler signal were simultaneously A/ D converted with a two-channel 12-bi ...
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.