Step by step through Heart Attack
... Arrhythmias: These are changes to your heart rhythm, which may happen after a heart attack. Your heart may go too fast or too slow. The fast rates are usually controlled by medicines, but if you have a slow heart rate, your doctor may need to insert a temporary pacemaker until your heart recovers. H ...
... Arrhythmias: These are changes to your heart rhythm, which may happen after a heart attack. Your heart may go too fast or too slow. The fast rates are usually controlled by medicines, but if you have a slow heart rate, your doctor may need to insert a temporary pacemaker until your heart recovers. H ...
The Treatment of Atrial Fibrillation
... not be needed after cardioversion. But in many patients, medications are needed to prevent an early recurrence of atrial fibrillation after cardioversion. The following are some important points about electrical cardioversion: 1. Electrical cardioversion terminates an episode of atrial fibrillation ...
... not be needed after cardioversion. But in many patients, medications are needed to prevent an early recurrence of atrial fibrillation after cardioversion. The following are some important points about electrical cardioversion: 1. Electrical cardioversion terminates an episode of atrial fibrillation ...
Management of Patients with Atrial Fibrillation: Focus on
... play important role both in the diagnosis and treatment of atrial fibrillation. Incidence of pacemaker-detected AF may reach 50% and its burden is associated with increased stroke risk.40,41 However, it was found that patients with subclinical pacemaker-detected AF are significantly less frequently ...
... play important role both in the diagnosis and treatment of atrial fibrillation. Incidence of pacemaker-detected AF may reach 50% and its burden is associated with increased stroke risk.40,41 However, it was found that patients with subclinical pacemaker-detected AF are significantly less frequently ...
Pacemakers 12/04 1-What is a pacemaker? 2
... heart doesn’t respond. The box is sensing that the intrinsic heart rate is too slow, but the output signal isn’t making the myocardium respond. You see this on a rhythm strip when there are clear pacing spikes coming from the box – at the right time after either an intrinsic beat or a paced one – bu ...
... heart doesn’t respond. The box is sensing that the intrinsic heart rate is too slow, but the output signal isn’t making the myocardium respond. You see this on a rhythm strip when there are clear pacing spikes coming from the box – at the right time after either an intrinsic beat or a paced one – bu ...
Cardiac conduction system
... defects of smooth muscle/ collagen /elastin or congenital or acquired defects of local arterial innervations may all play contributory roles. Sinus node artery is an unusually stressed artery, coursing through a comparatively dense collagen sheath, which might render it susceptible to mural disease. ...
... defects of smooth muscle/ collagen /elastin or congenital or acquired defects of local arterial innervations may all play contributory roles. Sinus node artery is an unusually stressed artery, coursing through a comparatively dense collagen sheath, which might render it susceptible to mural disease. ...
Pacemakers
... heart doesn’t respond. The box is sensing that the intrinsic heart rate is too slow, but the output signal isn’t making the myocardium respond. You see this on a rhythm strip when there are clear pacing spikes coming from the box – at the right time after either an intrinsic beat or a paced one – bu ...
... heart doesn’t respond. The box is sensing that the intrinsic heart rate is too slow, but the output signal isn’t making the myocardium respond. You see this on a rhythm strip when there are clear pacing spikes coming from the box – at the right time after either an intrinsic beat or a paced one – bu ...
The Significance of Changes in Amplitude of the First Heart Sound
... this late secondary rise (represented by the broken line) immediately precedes the primary zone of accentuation of the next cycle, so that it might appear as if the accentuated sound were related to the negative P-R (R-P) interval. There appears to be a relationship between growth and aging of the s ...
... this late secondary rise (represented by the broken line) immediately precedes the primary zone of accentuation of the next cycle, so that it might appear as if the accentuated sound were related to the negative P-R (R-P) interval. There appears to be a relationship between growth and aging of the s ...
Heart failure highlights in 20122013
... The incidence of diabetes is increasing, and diabetes is a common precursor of HF.38 Indeed, HF that occurs in diabetic patients is considered to result from a unique diabetes-related mechanism, which is often referred to as ‘diabetic cardiomyopathy’. Several mechanisms have been attributed as under ...
... The incidence of diabetes is increasing, and diabetes is a common precursor of HF.38 Indeed, HF that occurs in diabetic patients is considered to result from a unique diabetes-related mechanism, which is often referred to as ‘diabetic cardiomyopathy’. Several mechanisms have been attributed as under ...
Peer-reviewed Article PDF
... Histologically, the left ventricle is consisted of three major layers; the internal endocardium, the middle myocardium, and the external epicardium. The endocardium is the inner layer of the left ventricular wall and lined the ventricle chambers. It consists of three layers; the endothelial layer, t ...
... Histologically, the left ventricle is consisted of three major layers; the internal endocardium, the middle myocardium, and the external epicardium. The endocardium is the inner layer of the left ventricular wall and lined the ventricle chambers. It consists of three layers; the endothelial layer, t ...
The Heart Rate-Corrected QT Interval of
... equation log (QTJ = log (QT - P*[\og(HR) - \og(HRJ], where HRm is the reference heart rate. QTa (in seconds) is obtained by the inverse log function. HRm has no effect on statistical analysis, so any convenient value can be used. Bazett's and Fridencia's equation both set HRm = 60 bpm. When /3 has b ...
... equation log (QTJ = log (QT - P*[\og(HR) - \og(HRJ], where HRm is the reference heart rate. QTa (in seconds) is obtained by the inverse log function. HRm has no effect on statistical analysis, so any convenient value can be used. Bazett's and Fridencia's equation both set HRm = 60 bpm. When /3 has b ...
14 Cardiomegaliya
... Mandatory early morphological sign of carditis is fibroelastoz elastofibroz or endo-and myocardium. Late congenital carditis do ...
... Mandatory early morphological sign of carditis is fibroelastoz elastofibroz or endo-and myocardium. Late congenital carditis do ...
Introducing a novel mechanism to control heart rate in the ancestral
... back 0.5 billion years (Ota and Kuratani, 2007). Beyond their basal position in vertebrate evolution, hagfishes are biologically intriguing because of their anoxia tolerance and their legendary ability to produce copious amounts of slime (Hansen and Sidell, 1983; Stecyk and Farrell, 2006; Cox et al. ...
... back 0.5 billion years (Ota and Kuratani, 2007). Beyond their basal position in vertebrate evolution, hagfishes are biologically intriguing because of their anoxia tolerance and their legendary ability to produce copious amounts of slime (Hansen and Sidell, 1983; Stecyk and Farrell, 2006; Cox et al. ...
Heart Failure with Preserved Ejection Fraction
... and ARBs seem counterintuitive. In HFREF patients, ACE-inhibitors and ARBs have been shown to promote reverse remodelling and reduce myocardial fibrosis. The extent of myocardial fibrosis in HFPEF is less than in HFREF [42], a finding that may explain these results. The VALIDD trial demonstrated tha ...
... and ARBs seem counterintuitive. In HFREF patients, ACE-inhibitors and ARBs have been shown to promote reverse remodelling and reduce myocardial fibrosis. The extent of myocardial fibrosis in HFPEF is less than in HFREF [42], a finding that may explain these results. The VALIDD trial demonstrated tha ...
Course Book Cardiovascular Disease 2013-2014
... of ions across the sarcolemma. Excitation produces an action potential, a series of openings and closings of channels in the sarcolemma that allow ions (and current) to flow across the membrane. The action potential is a self-limiting process, and the sarcolemma and the cell return to the baseline p ...
... of ions across the sarcolemma. Excitation produces an action potential, a series of openings and closings of channels in the sarcolemma that allow ions (and current) to flow across the membrane. The action potential is a self-limiting process, and the sarcolemma and the cell return to the baseline p ...
Question paper - Unit B732/02 - Modules B4, B5, B6 - Higher
... The longer a contraction lasts, the greater the pressure that can be generated by the heart. Explain how and why the contraction time of the ventricles is different from the contraction time for the atria. ...
... The longer a contraction lasts, the greater the pressure that can be generated by the heart. Explain how and why the contraction time of the ventricles is different from the contraction time for the atria. ...
Exercise Tolerance Testing - Cardiac and Stroke Networks in
... It has been found that when RBBB develops during exercise (usually at slower heart rates rather than maximal heart rate) it is likely to be associated with coronary disease or other types of myocardial abnormality. Left Bundle Branch Block (LBBB) This tends to be associated with a decrease in the le ...
... It has been found that when RBBB develops during exercise (usually at slower heart rates rather than maximal heart rate) it is likely to be associated with coronary disease or other types of myocardial abnormality. Left Bundle Branch Block (LBBB) This tends to be associated with a decrease in the le ...
Optimal pacing strategies for coming off CPB
... sufficient in pt with normal systolic or diastolic function, in the hemodynamically compromised patients, adjustment of the AV delay to a real-time measure of cardiac output (such as Doppler time-velocity integral at the aortic valve, pulse contour analysis CO, or the mixed venous oxygen saturation) ...
... sufficient in pt with normal systolic or diastolic function, in the hemodynamically compromised patients, adjustment of the AV delay to a real-time measure of cardiac output (such as Doppler time-velocity integral at the aortic valve, pulse contour analysis CO, or the mixed venous oxygen saturation) ...
Maximum oxidative phosphorylation capacity of the mammalian heart
... Experimental buffer containing 0.2 mg mitochondria, 6 mM KzHP04, and substrate (1.2 ml total volume) was added to an oxygen chamber temperature controlled at 37°C. State 3 respiration was elicited by the addition of a known amount of ADP to the chamber. The rates of O2 consumption following the addi ...
... Experimental buffer containing 0.2 mg mitochondria, 6 mM KzHP04, and substrate (1.2 ml total volume) was added to an oxygen chamber temperature controlled at 37°C. State 3 respiration was elicited by the addition of a known amount of ADP to the chamber. The rates of O2 consumption following the addi ...
How to Program a Pacemaker: Pacing mode, Rate
... The device uses AV Search+ to periodically check for a return of intrinsic conduction and determine when to mode switch back to AAI(R) with VVI backup. If AV Search+ remains in AV hysteresis for at least 25 cardiac cycles, and less than 2 of the last 10 cycles are ventricular paced, then the device ...
... The device uses AV Search+ to periodically check for a return of intrinsic conduction and determine when to mode switch back to AAI(R) with VVI backup. If AV Search+ remains in AV hysteresis for at least 25 cardiac cycles, and less than 2 of the last 10 cycles are ventricular paced, then the device ...
Heart Failure: Definition
... • 1820 pts NYHA I-II, QRS≥130, LVEF≤30%: CRT-ICD vs ICD • ~40% NYHA II; 10% NYHA III-IV prior to enrollment Moss AJ et al, N Engl J Med 2009;361:1329-38. ...
... • 1820 pts NYHA I-II, QRS≥130, LVEF≤30%: CRT-ICD vs ICD • ~40% NYHA II; 10% NYHA III-IV prior to enrollment Moss AJ et al, N Engl J Med 2009;361:1329-38. ...
Terrovitis I Short CV
... Department of Cardiology. The new laboratory has tissue culture, molecular biology and small animal surgery capabilities. Currently, three MDs with experience in basic research are performing experiments in this lab. In addition, three medical graduates are conducting research in this lab, as a part ...
... Department of Cardiology. The new laboratory has tissue culture, molecular biology and small animal surgery capabilities. Currently, three MDs with experience in basic research are performing experiments in this lab. In addition, three medical graduates are conducting research in this lab, as a part ...
Outcomes Related to First-Degree Atrioventricular Block and
... from the sinoatrial node, across the right ...
... from the sinoatrial node, across the right ...
Retinoids and Cardiac Development
... mouse the heart tube is composed principally of contractile myocardium and endocardium essential for its pumping function. At this stage, the heart is not yet covered by the epicardium, an external tissue layer, which is only added during the establishment of cardiac chambers (Figure 1). Development ...
... mouse the heart tube is composed principally of contractile myocardium and endocardium essential for its pumping function. At this stage, the heart is not yet covered by the epicardium, an external tissue layer, which is only added during the establishment of cardiac chambers (Figure 1). Development ...
23 Electrpcardiography evaluation of heart work
... Ventricular complexes ORST If the amplitude of prongs of ORS-complex more than 5 mm, they are given uppercase alphabet (Q, R, S), if less than 5 mm - capital letters (q, r, s). Duration of ventricular complex is 0,06-0,09 s in the standard leads Wave Q displays spread of excitation through the middl ...
... Ventricular complexes ORST If the amplitude of prongs of ORS-complex more than 5 mm, they are given uppercase alphabet (Q, R, S), if less than 5 mm - capital letters (q, r, s). Duration of ventricular complex is 0,06-0,09 s in the standard leads Wave Q displays spread of excitation through the middl ...
Arrhythmogenic right ventricular dysplasia: from
... Clinical Presentation When symptoms are present, they tend to occur around 30 yrs of age. However, patients’ age can range from 10 to 50 years (4, 25). Men and women are equally affected. The most common symptoms of ARVD are due to arrhythmia. Symptoms include palpitations, dizziness, shortness of b ...
... Clinical Presentation When symptoms are present, they tend to occur around 30 yrs of age. However, patients’ age can range from 10 to 50 years (4, 25). Men and women are equally affected. The most common symptoms of ARVD are due to arrhythmia. Symptoms include palpitations, dizziness, shortness of b ...