Short-term cardiovascular effects of mental tasks Roon, Arie
... of contractile force of the ventricle. The cardiac action potential shows a plateau phase, which duration depends mainly on Ca++ current. The contractile force can be controlled by manipulating this Ca++ current. Normally, the transmission of action potentials throughout the heart is very similar fo ...
... of contractile force of the ventricle. The cardiac action potential shows a plateau phase, which duration depends mainly on Ca++ current. The contractile force can be controlled by manipulating this Ca++ current. Normally, the transmission of action potentials throughout the heart is very similar fo ...
Many survivors of surgical correction for tetralogy might not get the
... and prosthetic valves. Mechanical valves require one to be on a blood thinner such as wafarin. This can lead to bleeding problems which is a significant concern with the young adult who might be involved in active sports or become pregnant. The prosthetic valve is made of biological material, usuall ...
... and prosthetic valves. Mechanical valves require one to be on a blood thinner such as wafarin. This can lead to bleeding problems which is a significant concern with the young adult who might be involved in active sports or become pregnant. The prosthetic valve is made of biological material, usuall ...
The Significance of Changes in Amplitude of the First Heart Sound
... years demonstrated the effects of growth and aging on these phenomena. The data appear to indicate that the variable intensity of the first sound in complete A-V block is related to the position of the mitral valve at the time of ventricular systole. ...
... years demonstrated the effects of growth and aging on these phenomena. The data appear to indicate that the variable intensity of the first sound in complete A-V block is related to the position of the mitral valve at the time of ventricular systole. ...
Should Moderate or Greater Mitral Regurgitation Be Repaired in All
... the degree of hibernating myocardium that can be revascularized.8 Modern surgical heart failure specialists look for targets of opportunity which, when corrected, will help their patients’ compromised ventricles function more efficiently and potentially reverse remodel. Many heart failure patients c ...
... the degree of hibernating myocardium that can be revascularized.8 Modern surgical heart failure specialists look for targets of opportunity which, when corrected, will help their patients’ compromised ventricles function more efficiently and potentially reverse remodel. Many heart failure patients c ...
Impairment of left ventricular function by acute cardiac lymphatic
... 0008-6363/97/$17.00 Copyright 0 1997 Elsevier Science B.V. All rights reserved. PII S0008-63 63(96)00 177-0 ...
... 0008-6363/97/$17.00 Copyright 0 1997 Elsevier Science B.V. All rights reserved. PII S0008-63 63(96)00 177-0 ...
Light-induced termination of spiral wave arrhythmias by optogenetic
... especially in the elderly.1 Yet, knowledge about its underlying mechanisms remains far from complete, although reentrant conduction is widely accepted to play a prominent role in AF. Still, current treatment ...
... especially in the elderly.1 Yet, knowledge about its underlying mechanisms remains far from complete, although reentrant conduction is widely accepted to play a prominent role in AF. Still, current treatment ...
viding diagnostic insights into the pathophysiologic mechanisms under
... can be obtained by such an inexpensive instrument and expedient and reliable tool as the stethoscope. The following section reviews the fundamental technique of cardiac auscultation, emphasizing the diagnostic value and practical clinical applications of this time-honored (but endangered) art in thi ...
... can be obtained by such an inexpensive instrument and expedient and reliable tool as the stethoscope. The following section reviews the fundamental technique of cardiac auscultation, emphasizing the diagnostic value and practical clinical applications of this time-honored (but endangered) art in thi ...
Chemistry Problem Solving Drill
... Sotalol is used in the maintenance of sinus rhythm in patients with atrial fibrillation. ...
... Sotalol is used in the maintenance of sinus rhythm in patients with atrial fibrillation. ...
N1120 Test Blueprint
... Your patient who is scheduled for echocardiography today asks why this test is being performed. What is the nurse’s best response? a. To assess the structure of the heart and determine left ventricular function b. To assess for abnormal electrical impulses within the heart c. To evaluate the decreas ...
... Your patient who is scheduled for echocardiography today asks why this test is being performed. What is the nurse’s best response? a. To assess the structure of the heart and determine left ventricular function b. To assess for abnormal electrical impulses within the heart c. To evaluate the decreas ...
Successful primary percutaneous coronary interventions
... difficult to treat when performing PCI 6, 7. In the presented patient with STEMI of the inferior wall a very rare coronary artery anomaly, called dual LAD, was incidentally revealed during the primary PCI. He also had multivessel coronary disease which could have make treatment decision difficult, e ...
... difficult to treat when performing PCI 6, 7. In the presented patient with STEMI of the inferior wall a very rare coronary artery anomaly, called dual LAD, was incidentally revealed during the primary PCI. He also had multivessel coronary disease which could have make treatment decision difficult, e ...
Document
... third heart sound does not occur until the middle third of diastole is probably because during the early part of diastole, the ventricles are not filled sufficiently to create enough tension for reverberation. It may also be a result of tensing of the chordae tendineae during rapid filling and expan ...
... third heart sound does not occur until the middle third of diastole is probably because during the early part of diastole, the ventricles are not filled sufficiently to create enough tension for reverberation. It may also be a result of tensing of the chordae tendineae during rapid filling and expan ...
Congenital Heart Disease for the Adult Sonographer
... • Improve efficiency in congenital heart disease echo exam. • Increase congenital heart disease awareness amongst all sonographers. • Assure complete classification of cardiovascular morphology and physiology in any patient with congenital heart disease. ...
... • Improve efficiency in congenital heart disease echo exam. • Increase congenital heart disease awareness amongst all sonographers. • Assure complete classification of cardiovascular morphology and physiology in any patient with congenital heart disease. ...
electrophysiology study and Catheter Ablation
... It may take up to an hour or more to position these wires correctly. After the wires have been positioned, electrical testing of the heart is performed. You may experience palpitations or a sensation of racing heartbeat as a result of the electrical stimulation or rhythm disturbance. The rhythm can ...
... It may take up to an hour or more to position these wires correctly. After the wires have been positioned, electrical testing of the heart is performed. You may experience palpitations or a sensation of racing heartbeat as a result of the electrical stimulation or rhythm disturbance. The rhythm can ...
Novel Interventional Therapies to Modulate the Autonomic Tone in
... tricular nodes) (8), the epicardial neural plexus adds ...
... tricular nodes) (8), the epicardial neural plexus adds ...
the PDF - Heart Rhythm Society
... To summarize, cardiac injury induces molecular biodynamic changes, cellular responses, and anatomic changes that are the hallmark of remodeling. The interplay of cardiac dysfunction and circulatory perturbations leads to maladaptive physiologic responses and ultimately to the clinical manifestations ...
... To summarize, cardiac injury induces molecular biodynamic changes, cellular responses, and anatomic changes that are the hallmark of remodeling. The interplay of cardiac dysfunction and circulatory perturbations leads to maladaptive physiologic responses and ultimately to the clinical manifestations ...
Spectral pulsed-wave tissue Doppler imaging lateral-to
... contraction phase), S2 (after S1, during mechanical systole), and S3 (during isovolumic relaxation phase). As shown in Figure 1, two time intervals, linked to the start of the QRS complex were recorded: TO (time-to-onset of S2) and TP (time-to-peak of S2).7,15 These time intervals were rounded to th ...
... contraction phase), S2 (after S1, during mechanical systole), and S3 (during isovolumic relaxation phase). As shown in Figure 1, two time intervals, linked to the start of the QRS complex were recorded: TO (time-to-onset of S2) and TP (time-to-peak of S2).7,15 These time intervals were rounded to th ...
(Hemiechinus auritus) heart - Tubitak Journals
... In the evolutionary development of the vertebrate heart, the specialized atrioventricular conduction system appears as a phylogenetically new structural entity, which, to date, has been documented only in mammals and birds (Szabo et al., 1986). Moreover, in considering its development, it is very im ...
... In the evolutionary development of the vertebrate heart, the specialized atrioventricular conduction system appears as a phylogenetically new structural entity, which, to date, has been documented only in mammals and birds (Szabo et al., 1986). Moreover, in considering its development, it is very im ...
CHANGES IN AUTONOMIC TONE RESULTING FROM CIRCUMFERENTIAL PULMONARY VEIN ISOLATION by GEOFFREY SEABORN
... throughout the heart, which in turn causes circulatory instability. Incidents of AF can last from minutes to weeks, or may be permanent. A number of different methods can be used to manage a patient’s AF, the main goals of which are to prevent circulatory instability and stroke. While the risk of st ...
... throughout the heart, which in turn causes circulatory instability. Incidents of AF can last from minutes to weeks, or may be permanent. A number of different methods can be used to manage a patient’s AF, the main goals of which are to prevent circulatory instability and stroke. While the risk of st ...
Differentiation of Cardiac Masses by CMR
... adherence to tissue planes, unusual locations and involving multiple cardiac chambers, extracardiac disease (including lung or breast masses) ...
... adherence to tissue planes, unusual locations and involving multiple cardiac chambers, extracardiac disease (including lung or breast masses) ...
Relationship between plasma aldosterone and left ventricular
... Mean levels of baseline and stimulated PRA were similar in hypertensives and control group of normotensives. Baseline and stimulated PA levels were mildly but not significantly higher compared to control group. Using Tukey Kramer multiple analysis we found a significant positive correlation of both ...
... Mean levels of baseline and stimulated PRA were similar in hypertensives and control group of normotensives. Baseline and stimulated PA levels were mildly but not significantly higher compared to control group. Using Tukey Kramer multiple analysis we found a significant positive correlation of both ...
Favourable outcome in idiopathic ventricular fibrillation - Heart
... Sudden cardiac death survivors without overt given for non-sustained arrhythmias. Finally, heart disease are difficult to manage, espe- it must be noted that differences between cially since in most cases the underlying studies concerning the recurrence risk also arrhythmogenic mechanism is not well ...
... Sudden cardiac death survivors without overt given for non-sustained arrhythmias. Finally, heart disease are difficult to manage, espe- it must be noted that differences between cially since in most cases the underlying studies concerning the recurrence risk also arrhythmogenic mechanism is not well ...
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.