Paroxysmal Supraventricular Tachycardia
... depolarization was conducted down the antegrade limb of the re-entrant circuit and fortuitously failed to alter the cycle length of the tachycardia due to an exact "compensatory" delay of conduction down that limb. However, premature atrial depolarizations could be delivered over a range of 20-50 ms ...
... depolarization was conducted down the antegrade limb of the re-entrant circuit and fortuitously failed to alter the cycle length of the tachycardia due to an exact "compensatory" delay of conduction down that limb. However, premature atrial depolarizations could be delivered over a range of 20-50 ms ...
Health Technology Assessment Report 6 the Use of B Type
... Table 6 - 20 Sensitivity analysis: 83% sensitivity for LVSD and 21% specificity for GP-read ECG .....................................................67 Table 6 - 21 Sensitivity and specificity of a combination of diagnostic tests .67 Table 6 - 22 Sensitivity analysis: comparison of joint tests and ...
... Table 6 - 20 Sensitivity analysis: 83% sensitivity for LVSD and 21% specificity for GP-read ECG .....................................................67 Table 6 - 21 Sensitivity and specificity of a combination of diagnostic tests .67 Table 6 - 22 Sensitivity analysis: comparison of joint tests and ...
chronic cor pulmonale - Heart
... in more than 60–80% of the cases. The good correlations that have been observed in cardiac patients between PAP estimated from echo data and pressures measured invasively have not always been confirmed in COPD patients7 and a mean error of the estimate, for PAP, of about 10 mm Hg has been reported.7 ...
... in more than 60–80% of the cases. The good correlations that have been observed in cardiac patients between PAP estimated from echo data and pressures measured invasively have not always been confirmed in COPD patients7 and a mean error of the estimate, for PAP, of about 10 mm Hg has been reported.7 ...
Indications and Guidelines for Performance of
... undergoing noncardiac procedures enhances monitoring of myocardial function and intravascular volume status. High risk patients who would benefit from intraoperative TEE monitoring may include those with complex CHD and significant residual anatomic defects, as well as patients with myocardial dysfu ...
... undergoing noncardiac procedures enhances monitoring of myocardial function and intravascular volume status. High risk patients who would benefit from intraoperative TEE monitoring may include those with complex CHD and significant residual anatomic defects, as well as patients with myocardial dysfu ...
With a Heart Murmur - McGraw-Hill Education
... can provide additional information. A small and delayed upstroke (parvus et tardus) is consistent with severe AS. The carotid pulse examination is less discriminatory, however, in older patients with stiffened arteries. The electrocardiogram (ECG) shows signs of left ventricular hypertrophy (LVH) as ...
... can provide additional information. A small and delayed upstroke (parvus et tardus) is consistent with severe AS. The carotid pulse examination is less discriminatory, however, in older patients with stiffened arteries. The electrocardiogram (ECG) shows signs of left ventricular hypertrophy (LVH) as ...
Pericardial Disease: Etiology, Pathophysiology
... Recognition of Pericardial Effusion In a number of clinical circumstances pericardial effusion must first be suspected, after which its presence or absence must be definitely established. Pericardial effusion is suspected when a patient has one of the diseases that may be associated with pericardial ...
... Recognition of Pericardial Effusion In a number of clinical circumstances pericardial effusion must first be suspected, after which its presence or absence must be definitely established. Pericardial effusion is suspected when a patient has one of the diseases that may be associated with pericardial ...
ACE Inhibition as a Cornerstone of Hypertension Treatment
... showed that a 6-month treatment with perindopril 8 mg increased carotid distensibility to a greater extent than perindopril 4 mg, for a similar reduction in ambulatory BP.5 In hypertensives, a 1-year treatment with perindopril normalized the media-to-lumen ratio of small arteries, whereas atenolol d ...
... showed that a 6-month treatment with perindopril 8 mg increased carotid distensibility to a greater extent than perindopril 4 mg, for a similar reduction in ambulatory BP.5 In hypertensives, a 1-year treatment with perindopril normalized the media-to-lumen ratio of small arteries, whereas atenolol d ...
Simultaneous conduction over the fast and slow
... junctional tachycardias. In the case of atrial tachycardia, a relatively fixed AA interval with alternating longer and shorter AV and VA intervals would be expected. However, in the present case, the VA and AV intervals were fixed in all cycles. Premature ventricular extrastimuli delivered during Hi ...
... junctional tachycardias. In the case of atrial tachycardia, a relatively fixed AA interval with alternating longer and shorter AV and VA intervals would be expected. However, in the present case, the VA and AV intervals were fixed in all cycles. Premature ventricular extrastimuli delivered during Hi ...
Stable Angina and If Inhibition: New Insights and
... percutaneous, does not obviate the need for medical treatment. Medical therapy is necessary to prevent subsequent events and to treat residual or recurrent ischemia. In addition, not all patients with chronic ischemia require revascularization. Medical treatment is still recommended as first-line st ...
... percutaneous, does not obviate the need for medical treatment. Medical therapy is necessary to prevent subsequent events and to treat residual or recurrent ischemia. In addition, not all patients with chronic ischemia require revascularization. Medical treatment is still recommended as first-line st ...
Inhibition of histone deacetylase on ventricular remodeling in
... Values are means ⫾ SD. HR, heart rate; LVEDP, left ventricular (LV) end-diastolic pressure; LVESP, LV end-systolic pressure; RV, right ventricle; Theo, theophylline; Tri, tributyrin; VPA, valproic acid. *P ⬍ 0.05 vs. respective groups without infarction. †P ⬍ 0.05 vs. infarction with vehicle and VPA ...
... Values are means ⫾ SD. HR, heart rate; LVEDP, left ventricular (LV) end-diastolic pressure; LVESP, LV end-systolic pressure; RV, right ventricle; Theo, theophylline; Tri, tributyrin; VPA, valproic acid. *P ⬍ 0.05 vs. respective groups without infarction. †P ⬍ 0.05 vs. infarction with vehicle and VPA ...
Acute Myocardial Infarction: Serial Cardiac MR Imaging Shows a
... delayed gadolinium enhancement may significantly change during the 1st 2 days after reperfusion, suggesting that the enhanced region encompasses not only nonviable tissue but also viable portions of ischemically injured myocardium. Findings of human studies (18–22) in which CE cardiac MR was perform ...
... delayed gadolinium enhancement may significantly change during the 1st 2 days after reperfusion, suggesting that the enhanced region encompasses not only nonviable tissue but also viable portions of ischemically injured myocardium. Findings of human studies (18–22) in which CE cardiac MR was perform ...
Anderson 2014 Cochrane Overview
... (Racca 2010), contributing to a reduction in health-related quality of life (HRQoL) (Gravely-Witte 2007). CHD is now considered the leading cause of global mortality. According to the World Health Organization (WHO), CHD accounted for 12.9% of all deaths (seven million deaths) and 5.8% of total disa ...
... (Racca 2010), contributing to a reduction in health-related quality of life (HRQoL) (Gravely-Witte 2007). CHD is now considered the leading cause of global mortality. According to the World Health Organization (WHO), CHD accounted for 12.9% of all deaths (seven million deaths) and 5.8% of total disa ...
Scar Extension Measured by Magnetic Resonance–Based Signal
... and CCs related to the clinical VT were targeted first ...
... and CCs related to the clinical VT were targeted first ...
Anatomy and Physiology of the Heart
... heartbeat where myocardial fibers must contract and relax in a coordinated, rhythmic fashion Maintained by the heart's intrinsic electrical system, which originates and transmits electrical impulses through a specialized conduction pathway. Slides are not to be reproduced without the permission of ...
... heartbeat where myocardial fibers must contract and relax in a coordinated, rhythmic fashion Maintained by the heart's intrinsic electrical system, which originates and transmits electrical impulses through a specialized conduction pathway. Slides are not to be reproduced without the permission of ...
Understanding diastolic heart failure
... left ventricular ejection fraction and therefore were labelled as having “diastolic heart failure” implying that the underlying pathophysiology is due to diastolic dysfunction alone. However, using a combination of echocardiographical techniques, a variety of abnormalities were found including reduc ...
... left ventricular ejection fraction and therefore were labelled as having “diastolic heart failure” implying that the underlying pathophysiology is due to diastolic dysfunction alone. However, using a combination of echocardiographical techniques, a variety of abnormalities were found including reduc ...
Marja Heiskanen – Right ventricular metabolic responses to
... ”Positive health requires a knowledge of man’s primary constitution … There must also be exercise of which the effects must likewise be known … If there is any deficiency in … exercise the body will fall sick”. This is what Hippocrates stated more than two millennia ago (Blair and Morris, 2009). Tod ...
... ”Positive health requires a knowledge of man’s primary constitution … There must also be exercise of which the effects must likewise be known … If there is any deficiency in … exercise the body will fall sick”. This is what Hippocrates stated more than two millennia ago (Blair and Morris, 2009). Tod ...
A Guide For Patients: Patent Foramen Ovale
... reached via the insertion of catheters typically in a leg vein, maneuvered to the heart, and then used to insert or implant a medical device. The heart remains beating and the procedure is often done with the patient lightly sedated and using local anesthesia over the leg vein. PFO closure involves ...
... reached via the insertion of catheters typically in a leg vein, maneuvered to the heart, and then used to insert or implant a medical device. The heart remains beating and the procedure is often done with the patient lightly sedated and using local anesthesia over the leg vein. PFO closure involves ...
The Systolic Murmur—Benign or Serious?
... Intensity and patterns of splitting of S2 can also provide diagnostic information. Loud S2 implies high closing pressure (systemic or pulmonary hypertension), while appreciation of abnormal splitting can narrow the differential diagnostic possibilities raised by systolic murmurs. Physiological split ...
... Intensity and patterns of splitting of S2 can also provide diagnostic information. Loud S2 implies high closing pressure (systemic or pulmonary hypertension), while appreciation of abnormal splitting can narrow the differential diagnostic possibilities raised by systolic murmurs. Physiological split ...
Cardiac rehabilitation for people with heart disease
... (Racca 2010), contributing to a reduction in health-related quality of life (HRQoL) (Gravely-Witte 2007). CHD is now considered the leading cause of global mortality. According to the World Health Organization (WHO), CHD accounted for 12.9% of all deaths (seven million deaths) and 5.8% of total disa ...
... (Racca 2010), contributing to a reduction in health-related quality of life (HRQoL) (Gravely-Witte 2007). CHD is now considered the leading cause of global mortality. According to the World Health Organization (WHO), CHD accounted for 12.9% of all deaths (seven million deaths) and 5.8% of total disa ...
Best practice in the clinical management of atrial fibrillation in
... AF results from uncoordinated electrical activity within the heart’s atria resulting in an irregular ventricular response. This can occur intermittently or for more prolonged spells. This is thought to result in stasis of blood within the atria and subsequent clot formation. 2 The most significant a ...
... AF results from uncoordinated electrical activity within the heart’s atria resulting in an irregular ventricular response. This can occur intermittently or for more prolonged spells. This is thought to result in stasis of blood within the atria and subsequent clot formation. 2 The most significant a ...
Multimodal functional cardiac MRI in creatine kinase
... However, cardiac output and LV ejection fraction remained normal in these mice (15). Furthermore, when CK⫺/⫺ mice were examined 4 wk after the induction of myocardial infarction (MI), no evidence of adverse LV remodeling was seen (15). Therefore, the aim of the current study was to determine whether ...
... However, cardiac output and LV ejection fraction remained normal in these mice (15). Furthermore, when CK⫺/⫺ mice were examined 4 wk after the induction of myocardial infarction (MI), no evidence of adverse LV remodeling was seen (15). Therefore, the aim of the current study was to determine whether ...
ACLS PRE-TEST June, 2011
... Question 43: Following initiation of CPR and 1 shock for VF, this rhythm is present on the next rhythm check. A second shock is given and chest compressions are resumed immediately. An IV is in place and no drugs have been given. Bag-mask ventilations are producing visible chest rise. What is your n ...
... Question 43: Following initiation of CPR and 1 shock for VF, this rhythm is present on the next rhythm check. A second shock is given and chest compressions are resumed immediately. An IV is in place and no drugs have been given. Bag-mask ventilations are producing visible chest rise. What is your n ...
B-Type Natriuretic Peptide
... bioactivity in circulation, e.g., hypertension (53, 54 ). Corin thus seems to be involved in the biosynthesis of natriuretic peptides, and one report even suggests that corin is active in the circulation (55 ). Of note, atrial posttranslational processing of proANP and proBNP is likely to differ fro ...
... bioactivity in circulation, e.g., hypertension (53, 54 ). Corin thus seems to be involved in the biosynthesis of natriuretic peptides, and one report even suggests that corin is active in the circulation (55 ). Of note, atrial posttranslational processing of proANP and proBNP is likely to differ fro ...
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.