Swann Ganz Catheterisation and Cardiac Outputs
... in practise the timing of the injections is difficult ...
... in practise the timing of the injections is difficult ...
Heart Failure with Preserved Ejection Fraction
... with a high morbidity and mortality rate [1]. Because of a great number of older people worldwide, it is expected that the incidence and the prevalence of the heart failure (HF) will increase rapidly in the next decade [2]. Beside the improvement of medical treatment, the mortality rate from this di ...
... with a high morbidity and mortality rate [1]. Because of a great number of older people worldwide, it is expected that the incidence and the prevalence of the heart failure (HF) will increase rapidly in the next decade [2]. Beside the improvement of medical treatment, the mortality rate from this di ...
THE CARDIAC CYCLE
... the heart is called Cardiac cycle. Points to Note: Systole is the contraction of the cardiac muscles. Diastole is the relaxation of the cardiac muscles. The systole of both atria and ventricles never overlap. The diastole of atria and ventricles always overlaps. (so that filling can take pla ...
... the heart is called Cardiac cycle. Points to Note: Systole is the contraction of the cardiac muscles. Diastole is the relaxation of the cardiac muscles. The systole of both atria and ventricles never overlap. The diastole of atria and ventricles always overlaps. (so that filling can take pla ...
Permanent cardiac pacemaker: an emergency perspective
... depolarisation rector (widened and LBBB like QRS complex) that obscure the classic ECG finding of AMI.22 In addition ST and T wave abnormalities can be misleading because ischaemic injuries cannot be differentiated reliably from ECG changes secondary to ...
... depolarisation rector (widened and LBBB like QRS complex) that obscure the classic ECG finding of AMI.22 In addition ST and T wave abnormalities can be misleading because ischaemic injuries cannot be differentiated reliably from ECG changes secondary to ...
The S-ICD® System
... Annual inappropriate shock rate of 7% with some of these patients receiving shocks due to Rate > Shock Zone ...
... Annual inappropriate shock rate of 7% with some of these patients receiving shocks due to Rate > Shock Zone ...
Sample chapter – 7: Assessment of cardiac output and peripheral
... cardiac output of subject A was __________, while that of subject B was __________ and subject C was __________.The total peripheral resistance of subject B, namely __________ differed markedly from that of subject A, namely __________. Based on the above cardiac output values, and the fact that str ...
... cardiac output of subject A was __________, while that of subject B was __________ and subject C was __________.The total peripheral resistance of subject B, namely __________ differed markedly from that of subject A, namely __________. Based on the above cardiac output values, and the fact that str ...
CV Lecture 2
... – Atria contract before ventricles • Ventricular Excitation (fast conduction) – Down Bundle of His – Up Purkinje Fibers • Purkinje Fibers contact ventricle contractile cells • Ventricle contracts from apex up ...
... – Atria contract before ventricles • Ventricular Excitation (fast conduction) – Down Bundle of His – Up Purkinje Fibers • Purkinje Fibers contact ventricle contractile cells • Ventricle contracts from apex up ...
Acute and Chronic Heart Dilation Model
... Sigma-5DF signal conditioner-processor (CardioDynamics, Zoetermeer, The Netherlands) provided the current source and processed the segmental conductance, producing an on-line display of the LV contours, as well as continuous and instantaneous volume signals. The volume signals were combined with the ...
... Sigma-5DF signal conditioner-processor (CardioDynamics, Zoetermeer, The Netherlands) provided the current source and processed the segmental conductance, producing an on-line display of the LV contours, as well as continuous and instantaneous volume signals. The volume signals were combined with the ...
Left ventricular long-axis changes in early diastole
... settings (high enough pulse repetition frequency) to avoid aliasing within the tissue Doppler images. Each measurement of mitral annular motion was recorded for three cardiac cycles, and corresponding mean measurements were analysed with an off-line Microsoft NT workstation. LVEF was obtained using ...
... settings (high enough pulse repetition frequency) to avoid aliasing within the tissue Doppler images. Each measurement of mitral annular motion was recorded for three cardiac cycles, and corresponding mean measurements were analysed with an off-line Microsoft NT workstation. LVEF was obtained using ...
Journal of Molecular and Cellular Cardiology
... miR-1. In vertebrates, members of the miR-1 (miR-1-1, miR1-2, miR206) and miR-133 (miR-133a-1, miR-133a-2, miR-133b) families are co-transcribed from the same bi-cistronic transcripts. MiR-1-1/miR133a-2 are clustered in an intergenic region of human chromosome 20, whereas the miR-1-2/miR-133a-1 clus ...
... miR-1. In vertebrates, members of the miR-1 (miR-1-1, miR1-2, miR206) and miR-133 (miR-133a-1, miR-133a-2, miR-133b) families are co-transcribed from the same bi-cistronic transcripts. MiR-1-1/miR133a-2 are clustered in an intergenic region of human chromosome 20, whereas the miR-1-2/miR-133a-1 clus ...
Johns Hopkins Medicine: Atrial Fibrillation
... electrical stimulation; the millions of heart muscle cells all have the ability to create their own electrical signals, disrupting the normal sinus rhythm in the process. If these cells misfire, the heart may race from a normal resting rate of 60 to 90 beats per minute (bpm) up to 200 bpm, then slow ...
... electrical stimulation; the millions of heart muscle cells all have the ability to create their own electrical signals, disrupting the normal sinus rhythm in the process. If these cells misfire, the heart may race from a normal resting rate of 60 to 90 beats per minute (bpm) up to 200 bpm, then slow ...
Brugada Syndrome - Circulation: Arrhythmia and Electrophysiology
... as an autosomal-dominant inherited arrhythmic disorder characterized by ST elevation with successive negative T wave in the right precordial leads without structural cardiac abnormalities.1,2 Patients are at risk for sudden cardiac death (SCD) due to ventricular fibrillation (VF). Since 1953, the EC ...
... as an autosomal-dominant inherited arrhythmic disorder characterized by ST elevation with successive negative T wave in the right precordial leads without structural cardiac abnormalities.1,2 Patients are at risk for sudden cardiac death (SCD) due to ventricular fibrillation (VF). Since 1953, the EC ...
Left ventricular hypertrophy in aortic valve stenosis: friend or foe?
... left ventricular systolic stress than their wild-type counter mates, this has no consequence on long-term myocardial performance. In fact, knock-out animals lived longer. The conventional conception of physiological adaptation to pressure overload as a teleological mechanism to reduce wall stress th ...
... left ventricular systolic stress than their wild-type counter mates, this has no consequence on long-term myocardial performance. In fact, knock-out animals lived longer. The conventional conception of physiological adaptation to pressure overload as a teleological mechanism to reduce wall stress th ...
Respiratory modulation of heart sound morphology - AJP
... systolic contraction of the ventricles triggers vibrations of the heart walls, valves, and blood. These vibrations propagate through the thoracic cavity and are received on the chest wall as transient low-frequency vibro-acoustic signal, commonly known as the first heart sound, S1. At the end of sys ...
... systolic contraction of the ventricles triggers vibrations of the heart walls, valves, and blood. These vibrations propagate through the thoracic cavity and are received on the chest wall as transient low-frequency vibro-acoustic signal, commonly known as the first heart sound, S1. At the end of sys ...
Left ventricular outflow tract obstruction and Takotsubo syndrome
... which was usual for her. She was given aspirin and nitroglycerin, but the chest pain persisted (intensity 2/10). Twelve-lead ECG showed sinus rhythm with ST elevation in leads II, V and VI, and troponin was elevated (2.82 ng/ml). She was taken immediately to the cardiac catheterization lab where she ...
... which was usual for her. She was given aspirin and nitroglycerin, but the chest pain persisted (intensity 2/10). Twelve-lead ECG showed sinus rhythm with ST elevation in leads II, V and VI, and troponin was elevated (2.82 ng/ml). She was taken immediately to the cardiac catheterization lab where she ...
Optical control of excitation waves in cardiac tissue
... light is demonstrated to optically control the direction, speed and spiral chirality of such waves in cardiac tissue. This alloptical approach offers a new experimental platform for the study and control of pattern formation in complex biological excitable systems. Heart cells form a dense, well-cou ...
... light is demonstrated to optically control the direction, speed and spiral chirality of such waves in cardiac tissue. This alloptical approach offers a new experimental platform for the study and control of pattern formation in complex biological excitable systems. Heart cells form a dense, well-cou ...
B-type natriuretic peptide in the management of heart failure
... A BNP level of lower than 100 pg/mL in the pulmonary hypertension is more severe.13 With BNP presence of acute dyspnoea virtually rules out heart values in the range of 100 to 400 pg/mL, and if these failure with a negative predictive value of 89%.5 This pulmonary conditions can be excluded, heart f ...
... A BNP level of lower than 100 pg/mL in the pulmonary hypertension is more severe.13 With BNP presence of acute dyspnoea virtually rules out heart values in the range of 100 to 400 pg/mL, and if these failure with a negative predictive value of 89%.5 This pulmonary conditions can be excluded, heart f ...
Effect of Heart Rate Control With Esmolol on Hemodynamic and
... norepinephrine, −0.11 μg/kg/min (IQR, −0.46 to 0.02) for the esmolol group vs −0.01 μg/kg/min (IQR, −0.2 to 0.44) for the control group (P = .003). Fluid requirements were reduced in the esmolol group: median AUC was 3975 mL/24 h (IQR, 3663 to 4200) vs 4425 mL/24 h (IQR, 4038 to 4775) for the contro ...
... norepinephrine, −0.11 μg/kg/min (IQR, −0.46 to 0.02) for the esmolol group vs −0.01 μg/kg/min (IQR, −0.2 to 0.44) for the control group (P = .003). Fluid requirements were reduced in the esmolol group: median AUC was 3975 mL/24 h (IQR, 3663 to 4200) vs 4425 mL/24 h (IQR, 4038 to 4775) for the contro ...
Information for the Traveling Pacemaker or
... most recent device interrogation. This will identify device settings and predicted longevity. LATITUDE Communicator When you arrive, repeat the setup process following the on-screen instructions. This will verify successful communication between your implanted heart device, the Communicator, and the ...
... most recent device interrogation. This will identify device settings and predicted longevity. LATITUDE Communicator When you arrive, repeat the setup process following the on-screen instructions. This will verify successful communication between your implanted heart device, the Communicator, and the ...
Anatomy and Physiology of the Heart
... Ventricular Systole--the first heart sound -- S1. At the conclusion of ventricular systole, when the ventricles relax to receive blood from the atria, the semilunar valves—the pulmonary and aortic valves—snap shut producing the dupp sound. Ventricular diastole-- second heart sound -- S2,. In ...
... Ventricular Systole--the first heart sound -- S1. At the conclusion of ventricular systole, when the ventricles relax to receive blood from the atria, the semilunar valves—the pulmonary and aortic valves—snap shut producing the dupp sound. Ventricular diastole-- second heart sound -- S2,. In ...
Right ventricle
... ventricle through 4 pulmonary veins. Right ventricle pulmonary arteries lungs pulmonary veins left atrium Systemic circulation: the oxygenated blood travels from the left ventricle via the aorta which gives branches to the various areas of the body. Gas, nutrient, and waste exchange occur ac ...
... ventricle through 4 pulmonary veins. Right ventricle pulmonary arteries lungs pulmonary veins left atrium Systemic circulation: the oxygenated blood travels from the left ventricle via the aorta which gives branches to the various areas of the body. Gas, nutrient, and waste exchange occur ac ...
Print - Circulation Research
... volume-hypertrophied group was significantly increased in comparison to the control and normal groups. There were significant increases in the mean right ventricular volumes and the mean left ventricular volumes in the volume-hypertrophied group. The valve-to-apex distance also was significantly inc ...
... volume-hypertrophied group was significantly increased in comparison to the control and normal groups. There were significant increases in the mean right ventricular volumes and the mean left ventricular volumes in the volume-hypertrophied group. The valve-to-apex distance also was significantly inc ...
... surgery up to 60 min. Arrhythmias were classified according to the Lambeth Conventions [24] and their severity was scored (range 0–5) [25] as detailed in the Additional file 1: S4. Moreover, an extensive ECG analysis was carried out at 4 weeks after infarction as previously described [26]. The ECG p ...
Right atrial thrombus and its causes
... atrium protruding into the right ventricle. The right and left ventricular functions were markedly depressed, with akinetic left ventricular inferior wall. The patient was started on a heparin drip and transferred to our institution. He was hemodynamically stable at presentation. Based on the size o ...
... atrium protruding into the right ventricle. The right and left ventricular functions were markedly depressed, with akinetic left ventricular inferior wall. The patient was started on a heparin drip and transferred to our institution. He was hemodynamically stable at presentation. Based on the size o ...
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.