
Ventilatory Abnormalities During Exercise in Heart Failure: A Mini
... The rise in VE and VCO2 with aerobic exercise is tightly coupled as increasing carbon dioxide levels as a consequence of increased metabolism and, at higher exercise intensities, lactic acid buffering drive the ventilatory response. This relationship is most commonly expressed as the VE/VCO2 slope, ...
... The rise in VE and VCO2 with aerobic exercise is tightly coupled as increasing carbon dioxide levels as a consequence of increased metabolism and, at higher exercise intensities, lactic acid buffering drive the ventilatory response. This relationship is most commonly expressed as the VE/VCO2 slope, ...
Angina pectoris and anti-anginal drugs
... Angina pectoris is a characteristic sudden, severe, pressing chest pain radiating to the neck, jaw, back, and arms resulting from myocardial Ischemia, i.e. the coronary blood flow (which feed the heart) is insufficient to meet the oxygen demands of the myocardium, leading to ischemia. This imbalance ...
... Angina pectoris is a characteristic sudden, severe, pressing chest pain radiating to the neck, jaw, back, and arms resulting from myocardial Ischemia, i.e. the coronary blood flow (which feed the heart) is insufficient to meet the oxygen demands of the myocardium, leading to ischemia. This imbalance ...
TITLE PAGE Article title: Value of sequential
... Regular monitoring of left ventricular ejection fraction (LVEF) for thalassemia major (TM) is widely practiced, but its value in informing iron chelation treatment is unclear. 81 TM patients without previous cardiac history received quantitative yearly LVEF monitoring by radionuclide ventriculograph ...
... Regular monitoring of left ventricular ejection fraction (LVEF) for thalassemia major (TM) is widely practiced, but its value in informing iron chelation treatment is unclear. 81 TM patients without previous cardiac history received quantitative yearly LVEF monitoring by radionuclide ventriculograph ...
23 Electrpcardiography evaluation of heart work
... 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 middle and lower thirds of the interventricular septum. It should not exceed 1/4 of prongs ʼ R amplitude in a healthy person, and its duration – 0,03 sec. But aVR- ...
... 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 middle and lower thirds of the interventricular septum. It should not exceed 1/4 of prongs ʼ R amplitude in a healthy person, and its duration – 0,03 sec. But aVR- ...
Pacemaker Leads - The American Association for the Surgery of
... – Retrograde ventriculoatrial (VA) conduction inverted P, ↑ PR, AV dissociation – Absence of rate response to physiologic need ...
... – Retrograde ventriculoatrial (VA) conduction inverted P, ↑ PR, AV dissociation – Absence of rate response to physiologic need ...
Systolic time intervals as simple
... Systolic time intervals Based on pulsed Doppler aortic acquisitions, STI were obtained: aortic pre-ejectional period (PEP: delay from Q wave of QRS to aortic valve opening, ms) and LV ejection time (LVET, ms) (Figure 1). In simple terms, PEP is the interval from the onset of ventricular depolarizati ...
... Systolic time intervals Based on pulsed Doppler aortic acquisitions, STI were obtained: aortic pre-ejectional period (PEP: delay from Q wave of QRS to aortic valve opening, ms) and LV ejection time (LVET, ms) (Figure 1). In simple terms, PEP is the interval from the onset of ventricular depolarizati ...
Cardiac Pacemakers
... Heart Disease Therapy The aim, coordinated functioning of heart in accordance with physiological needs is achieved by: • repeating heart contractions sufficient to keep patients alive, • reducing syndroms caused by irregular heart function, • protecting patients from possible complications, • impro ...
... Heart Disease Therapy The aim, coordinated functioning of heart in accordance with physiological needs is achieved by: • repeating heart contractions sufficient to keep patients alive, • reducing syndroms caused by irregular heart function, • protecting patients from possible complications, • impro ...
The ResQ Trial - Whatcom County EMS Council
... bellows. • During chest compression, increased intrathoracic pressure, aided by one-way valves in the heart and venous system, cause forward movement of blood through the circulatory system. ...
... bellows. • During chest compression, increased intrathoracic pressure, aided by one-way valves in the heart and venous system, cause forward movement of blood through the circulatory system. ...
Current treatment of ventricular arrhythmias: State of
... The selection of patients for primary prevention ICDs remains imperfect.30 Most are implanted on the basis of a low LV ejection fraction.30,34 Although the majority of patients will not have spontaneous arrhythmias requiring therapy and the absolute survival benefit in trials was modest (Table 1), a ...
... The selection of patients for primary prevention ICDs remains imperfect.30 Most are implanted on the basis of a low LV ejection fraction.30,34 Although the majority of patients will not have spontaneous arrhythmias requiring therapy and the absolute survival benefit in trials was modest (Table 1), a ...
Mouse Electrocardiogram Equipment: Power Lab/4SP with ML135
... The mouse is anesthetized with 1-2% isoflurane in 700 ml O2/minute via facemask (following induction in a chamber containing 5% isoflurane). Rectal temperature is continuously monitored and maintained within 37-38°C using a heat pad and heat lamp. The lead II ECG is recorded from needle electrodes i ...
... The mouse is anesthetized with 1-2% isoflurane in 700 ml O2/minute via facemask (following induction in a chamber containing 5% isoflurane). Rectal temperature is continuously monitored and maintained within 37-38°C using a heat pad and heat lamp. The lead II ECG is recorded from needle electrodes i ...
Electroanatomical Mapping Systems and Cardiac Arrhythmias
... Introduction: Cardiac arrhythmias are challenging conditions in pediatric patients, especially in the case of newborns. Most of the tachyarrhythmias in children (90.24%) are atrioventricular reentrant tachycardias (AVRT) and atrioventricular nodal reentrant tachycardias (AVNRT). Although the standar ...
... Introduction: Cardiac arrhythmias are challenging conditions in pediatric patients, especially in the case of newborns. Most of the tachyarrhythmias in children (90.24%) are atrioventricular reentrant tachycardias (AVRT) and atrioventricular nodal reentrant tachycardias (AVNRT). Although the standar ...
Slide 1
... • Door-to-Balloon is a time measurement in emergency cardiac care, specifically in the treatment of STEMI – Delays in treating a myocardial infarction increase the likelihood and amount of cardiac muscle damage ...
... • Door-to-Balloon is a time measurement in emergency cardiac care, specifically in the treatment of STEMI – Delays in treating a myocardial infarction increase the likelihood and amount of cardiac muscle damage ...
Heartstart Information - Heatley Mere Residents Association
... access units which can be found in places where people may congregate. The location of a public access AED should take in to account where large groups of people gather, regardless of age or activity. Children as well as adults may fall victim to sudden cardiac arrest (SCA) In order to make them hig ...
... access units which can be found in places where people may congregate. The location of a public access AED should take in to account where large groups of people gather, regardless of age or activity. Children as well as adults may fall victim to sudden cardiac arrest (SCA) In order to make them hig ...
Autonomic dysfunction in patients with nocturnal hypoventilation in extrapulmonary restrictive disease
... based on cardiovascular reflex testing [7, 8], acetylcholine sweat-spot scores [9], and studies of electrocardiographic QTc intervals [10] in COPD. Autonomic dysfunction in other conditions is associated with myocardial electrical instability and a high risk of arrhythmic death, and in COPD patients ...
... based on cardiovascular reflex testing [7, 8], acetylcholine sweat-spot scores [9], and studies of electrocardiographic QTc intervals [10] in COPD. Autonomic dysfunction in other conditions is associated with myocardial electrical instability and a high risk of arrhythmic death, and in COPD patients ...
Profound Bradycardia With Decreased PEEP
... A diagnostic evaluation for the mechanism of bradycardia targeting potential etiologies should be initiated, starting with a review of the patient’s history and physical exam. Clinicians first must differentiate sinus bradycardia from bradydysrhythmias, as this distinction may guide further work-up. ...
... A diagnostic evaluation for the mechanism of bradycardia targeting potential etiologies should be initiated, starting with a review of the patient’s history and physical exam. Clinicians first must differentiate sinus bradycardia from bradydysrhythmias, as this distinction may guide further work-up. ...
Bedside Flow-Directed Balloon Catheterization in the Critically Ill
... Mixed venous Po 2 ( Pvo 2 ). The flow-directed catheter also permits sampling of true mixed venous blood (obtained from the pulmonary artery) for Po 2 and oxygen content determinations. The Pvo 2 (normal range in a nonanemic patient, 35 to 40 torr) reflects changes in cardiac output and tissue perfu ...
... Mixed venous Po 2 ( Pvo 2 ). The flow-directed catheter also permits sampling of true mixed venous blood (obtained from the pulmonary artery) for Po 2 and oxygen content determinations. The Pvo 2 (normal range in a nonanemic patient, 35 to 40 torr) reflects changes in cardiac output and tissue perfu ...
Anesthetic Management During Stenting of Obstructed Total
... in respiratory function. The care of these critically ill neonates with CHD is compounded by the fact that direct measurements of cardiac output are not possible. Intraoperative data have demonstrated a progressive increase in the base deficit when the PaO2 drops below 50 mm Hg [11]. Conversely, an ...
... in respiratory function. The care of these critically ill neonates with CHD is compounded by the fact that direct measurements of cardiac output are not possible. Intraoperative data have demonstrated a progressive increase in the base deficit when the PaO2 drops below 50 mm Hg [11]. Conversely, an ...
Digitalis induced paroxysmal atrial tachycardia with AV block
... inpatients are described. Cases of cor pulmonale with hypoxia were more prone to develop this arrhythmia. Electrocardiographic features consisted of an atrial rate ranging from I15 to 230 a minute and an altered configuration of the P wave which was diminutive in nearly hal the cases. The block at t ...
... inpatients are described. Cases of cor pulmonale with hypoxia were more prone to develop this arrhythmia. Electrocardiographic features consisted of an atrial rate ranging from I15 to 230 a minute and an altered configuration of the P wave which was diminutive in nearly hal the cases. The block at t ...
Heart failure in patients with sick sinus syndrome
... the case of SSS without impaired AV conduction.9 In small trials in patients with SSS, DDDR pacing was associated with more atrial fibrillation, increased left atrial diameter, and decreased left ventricular performance as assessed by M-mode and tissue Doppler echocardiography.3,13,14 However, the i ...
... the case of SSS without impaired AV conduction.9 In small trials in patients with SSS, DDDR pacing was associated with more atrial fibrillation, increased left atrial diameter, and decreased left ventricular performance as assessed by M-mode and tissue Doppler echocardiography.3,13,14 However, the i ...
Alcoholic Cardiomyopathy: A Review
... in those who abstained as well as those who controlled drinking (!60 g ethanol/day), as shown in Fig. 3.51 Interestingly, in a subset analysis of the Studies of Left Ventricular Dysfunction, light to moderate drinkers with ischemic cardiomyopathy had significantly lower mortality rates compared with ...
... in those who abstained as well as those who controlled drinking (!60 g ethanol/day), as shown in Fig. 3.51 Interestingly, in a subset analysis of the Studies of Left Ventricular Dysfunction, light to moderate drinkers with ischemic cardiomyopathy had significantly lower mortality rates compared with ...
Does Left Atrial Size Predict Mortality in Asymptomatic Patients with
... Furthermore, left atrial dilatation (LAD ≥ 45 mm) augmented the risk of death in asymptomatic patients who were older (≥70 years) and not living independently. Our present study showed an important association between left atrial size and outcome in patients with severe but asymptomatic AS. Our find ...
... Furthermore, left atrial dilatation (LAD ≥ 45 mm) augmented the risk of death in asymptomatic patients who were older (≥70 years) and not living independently. Our present study showed an important association between left atrial size and outcome in patients with severe but asymptomatic AS. Our find ...
Ventricular Arterial Stiffening
... from the same set of PV loops shown in Figure 1B. Decreasing preload results in only a modest decline in systolic blood pressure in the younger individual but a much greater change in the older subject. As previously reported,5 the slope of such relations is determined by both arterial and ventricul ...
... from the same set of PV loops shown in Figure 1B. Decreasing preload results in only a modest decline in systolic blood pressure in the younger individual but a much greater change in the older subject. As previously reported,5 the slope of such relations is determined by both arterial and ventricul ...
Curriculum Vitae - Amazon Web Services
... investigate mechanisms of ventricular tachycardia and heterogeneities in conduction in left bundle branch block. Non-contact mapping records global activation from an entire cardiac chamber on a beat-by-beat basis thereby enabling insights previously only possible using animal models. In addition to ...
... investigate mechanisms of ventricular tachycardia and heterogeneities in conduction in left bundle branch block. Non-contact mapping records global activation from an entire cardiac chamber on a beat-by-beat basis thereby enabling insights previously only possible using animal models. In addition to ...
Echo in a Heartbeat
... one single heartbeat it acquires a full volume of the heart, automatically extracting all the information that is needed to conduct a complete study.“ For all of his enthusiasm for the ACUSON SC2000 echocardiography system, Zamorano believes that the echo-in-a-heartbeat technology is not the last wo ...
... one single heartbeat it acquires a full volume of the heart, automatically extracting all the information that is needed to conduct a complete study.“ For all of his enthusiasm for the ACUSON SC2000 echocardiography system, Zamorano believes that the echo-in-a-heartbeat technology is not the last wo ...
- Wiley Online Library
... effects by preventing cardiac fibrosis and hypertrophy.3 However, the potential cardiovascular beneficial effects of PPARg agonism have recently been questioned based on the evidence that rosiglitazone treatment to diabetic individuals may cause an increase in cardiovascular mortality of an unclear ...
... effects by preventing cardiac fibrosis and hypertrophy.3 However, the potential cardiovascular beneficial effects of PPARg agonism have recently been questioned based on the evidence that rosiglitazone treatment to diabetic individuals may cause an increase in cardiovascular mortality of an unclear ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.