2014 ACC/AHA Guideline on Perioperative
... methodology is the development of recommendations on the basis of all available evidence. Literature searches focus on randomized controlled trials (RCTs) but also include registries, nonrandomized comparative and descriptive studies, case series, cohort studies, systematic reviews, and expert opini ...
... methodology is the development of recommendations on the basis of all available evidence. Literature searches focus on randomized controlled trials (RCTs) but also include registries, nonrandomized comparative and descriptive studies, case series, cohort studies, systematic reviews, and expert opini ...
Assessment of Heart Rates and Blood Pressure in
... HR in the prostrate position reduced significantly. We hypothesise that in the standing position, venous return decreased due to “venous pooling” in the lower limbs arising from the gravitational effects28). This decrease in venous return would have lead to a reduced cardiac output, leading to a red ...
... HR in the prostrate position reduced significantly. We hypothesise that in the standing position, venous return decreased due to “venous pooling” in the lower limbs arising from the gravitational effects28). This decrease in venous return would have lead to a reduced cardiac output, leading to a red ...
F W James, S Kaplan, C J Glueck, J Y... 1980;61:902-912 doi: 10.1161/01.CIR.61.5.902
... procedure in revealing significant abnormalities that may influence the clinical management of young patients." 4 12 Several exercise protocols using the bicycle ergometer have been reported.'3- ' However, exercise data for normal children using these protocols are often incomplete and difficult to ...
... procedure in revealing significant abnormalities that may influence the clinical management of young patients." 4 12 Several exercise protocols using the bicycle ergometer have been reported.'3- ' However, exercise data for normal children using these protocols are often incomplete and difficult to ...
CHAPTER 13 Electrocardiography
... ions. A positive current moving in one direction is equivalent to a negative current of equal strength moving in the opposite direction. Through a purely arbitrary choice, electrophysiological currents are considered to be the movement of positive charge. The process of generating the cardiac electr ...
... ions. A positive current moving in one direction is equivalent to a negative current of equal strength moving in the opposite direction. Through a purely arbitrary choice, electrophysiological currents are considered to be the movement of positive charge. The process of generating the cardiac electr ...
Changes in cardiac troponin I concentration and in stallions
... Cardiac troponin I has been evaluated in a number of human studies and has demonstrated increased concentrations in a small percentage of human athletes participating in endurance events.37,57 However, no consistency have been found in these biochemical changes, and neither the mechanism nor the sig ...
... Cardiac troponin I has been evaluated in a number of human studies and has demonstrated increased concentrations in a small percentage of human athletes participating in endurance events.37,57 However, no consistency have been found in these biochemical changes, and neither the mechanism nor the sig ...
Cardiac Cycle - Just In Time Medicine
... Each cardiac cycle (heart beat) consists of ventricular diastole (relaxation), followed by ventricular systole (contraction). Atrial systole (atrial contraction) occurs during ventricular diastole. Atrial contraction is initiated by atrial depolarization, which is indicated by the P wave in the ECG. ...
... Each cardiac cycle (heart beat) consists of ventricular diastole (relaxation), followed by ventricular systole (contraction). Atrial systole (atrial contraction) occurs during ventricular diastole. Atrial contraction is initiated by atrial depolarization, which is indicated by the P wave in the ECG. ...
Development of Digital Myocardial Phantom to Evaluate Software for
... Results: Myo-Simu successfully generated SPECT images of various geometries. These images can be applied to gated SPECT analyses without any problems in operation. In QGS, measured LV volumes changed greatly depending on wall thickness and spatial resolution. Conclusions: Myo-Simu is a feasible phan ...
... Results: Myo-Simu successfully generated SPECT images of various geometries. These images can be applied to gated SPECT analyses without any problems in operation. In QGS, measured LV volumes changed greatly depending on wall thickness and spatial resolution. Conclusions: Myo-Simu is a feasible phan ...
cardiovascular system
... Amount of blood pumped by each side (ventricle) of the heart in one minute Stroke volume (SV) Volume of blood pumped by each ventricle in one contraction (each heartbeat) Usually remains relatively constant About 70 mL of blood is pumped out of the left ventricle with each heartbeat Heart rate (HR) ...
... Amount of blood pumped by each side (ventricle) of the heart in one minute Stroke volume (SV) Volume of blood pumped by each ventricle in one contraction (each heartbeat) Usually remains relatively constant About 70 mL of blood is pumped out of the left ventricle with each heartbeat Heart rate (HR) ...
Left atrial strain in patients with arterial hypertension
... filling were recorded from the apical 4-chamber view, by placing the sample volume at the level of the tips of the mitral valve leaflets and the centre of the forward LV filling jet. Early (E) and late (A) diastolic LV filling velocities were measured and E/A ratio was calculated. E/A ratio 29 and E ...
... filling were recorded from the apical 4-chamber view, by placing the sample volume at the level of the tips of the mitral valve leaflets and the centre of the forward LV filling jet. Early (E) and late (A) diastolic LV filling velocities were measured and E/A ratio was calculated. E/A ratio 29 and E ...
Clinical recommendations for cardiopulmonary exercise testing data
... Several CPX statements have been published by well-respected organizations in both the US and Europe.1 – 5 Despite these prominent reports and the plethora of pertinent medical literature which they feature, underutilization of CPX persists. This discrepancy is at least partly attributable to the fa ...
... Several CPX statements have been published by well-respected organizations in both the US and Europe.1 – 5 Despite these prominent reports and the plethora of pertinent medical literature which they feature, underutilization of CPX persists. This discrepancy is at least partly attributable to the fa ...
Peripheral Muscle Microcirculatory Alterations in Patients With
... the PAH subjects was performed within 1 month of the near-infrared spectroscopy evaluation, as part of their PAH follow-up in our institution. None of the PAH subjects had history/evidence of thromboembolic pulmonary disease on isotope perfusion scanning of the lungs, or other secondary causes of PA ...
... the PAH subjects was performed within 1 month of the near-infrared spectroscopy evaluation, as part of their PAH follow-up in our institution. None of the PAH subjects had history/evidence of thromboembolic pulmonary disease on isotope perfusion scanning of the lungs, or other secondary causes of PA ...
Monitoring acute coronary syndrome using national hospital data
... diseases spanning acute myocardial infarction (AMI) and unstable angina (UA). They are sudden, severe and life-threatening events. Currently there is no way to directly count the number of ACS events at a national level. Australia does not have a national register of ACS or a database that enables i ...
... diseases spanning acute myocardial infarction (AMI) and unstable angina (UA). They are sudden, severe and life-threatening events. Currently there is no way to directly count the number of ACS events at a national level. Australia does not have a national register of ACS or a database that enables i ...
Report of the Crystal City Meeting to Maximize the Use of Organs
... the national list of patients waiting for expanded donor kidneys for a period of 2 h, after which time the UNOS Organ Center will notify the Host OPO that it may allocate the expanded criteria kidneys by the standard geographical sequence of local and regional allocation. OPOs would be required to i ...
... the national list of patients waiting for expanded donor kidneys for a period of 2 h, after which time the UNOS Organ Center will notify the Host OPO that it may allocate the expanded criteria kidneys by the standard geographical sequence of local and regional allocation. OPOs would be required to i ...
Use of quinine and mortality-risk in patients with heart failure—a
... if they had a discharge diagnosis available within a 10-year period prior to actual observational time, meaning that comorbidities were updated continuously. The diagnosis of diabetes was obtained from claimed prescriptions for glucose-lowering medications (anatomical therapeutic classification [ATC] ...
... if they had a discharge diagnosis available within a 10-year period prior to actual observational time, meaning that comorbidities were updated continuously. The diagnosis of diabetes was obtained from claimed prescriptions for glucose-lowering medications (anatomical therapeutic classification [ATC] ...
Abnormal electrocardiographic findings in athletes
... Juvenile pattern of TWI TWI in the anterior precordial leads in younger, prepubertal athletes often reflects a persistent juvenile pattern and requires careful interpretation. In Caucasian adolescent athletes, anterior precordial TWI extending beyond V2 was present in 1.2% of athletes <16 years but o ...
... Juvenile pattern of TWI TWI in the anterior precordial leads in younger, prepubertal athletes often reflects a persistent juvenile pattern and requires careful interpretation. In Caucasian adolescent athletes, anterior precordial TWI extending beyond V2 was present in 1.2% of athletes <16 years but o ...
Analysis of Left Ventricular Function
... biventricular cineangiogram. The purpose of the present report is to present a new semiautomated technique for noninvasively determining left ventricular ejection fraction and ejection rate from the multiple gated cardiac blood pool images and to correlate them with ventricular volume curves obtaine ...
... biventricular cineangiogram. The purpose of the present report is to present a new semiautomated technique for noninvasively determining left ventricular ejection fraction and ejection rate from the multiple gated cardiac blood pool images and to correlate them with ventricular volume curves obtaine ...
Management of Patients With Ventricular
... ■ Sufficient evidence from multiple randomized trials or meta-analyses ...
... ■ Sufficient evidence from multiple randomized trials or meta-analyses ...
patent ductus arteriosus with pulmonary hypertension - Heart
... had occurred in some vessels. The media of the small muscular arteries was hypertrophied. Both elastic membranes were well defined and, although the internal elastic membrane was thicker than normal, it was not split. The adventitia was normal (Fig. 11). The arterioles (<0 1 mm. in diameter) showed ...
... had occurred in some vessels. The media of the small muscular arteries was hypertrophied. Both elastic membranes were well defined and, although the internal elastic membrane was thicker than normal, it was not split. The adventitia was normal (Fig. 11). The arterioles (<0 1 mm. in diameter) showed ...
Mitral Annulus Calcification
... Mitral annulus calcification (MAC) is a chronic, degenerative process in the fibrous base of the mitral valve. Although MAC was initially thought to be an age-related degenerative process, there is accumulating evidence that other mechanisms, such as atherosclerosis and abnormal calcium-phosphorus met ...
... Mitral annulus calcification (MAC) is a chronic, degenerative process in the fibrous base of the mitral valve. Although MAC was initially thought to be an age-related degenerative process, there is accumulating evidence that other mechanisms, such as atherosclerosis and abnormal calcium-phosphorus met ...
Articles in PresS. Am J Physiol Heart Circ Physiol (February 3, 2012
... Electrophysiological and optical mapping studies revealed age-related slowing of ventricular ...
... Electrophysiological and optical mapping studies revealed age-related slowing of ventricular ...
3 SHOCK Management of Shock James W. Holcroft,
... blood flow to the skin—on the order of 300 ml/min in a 60 kg subject.4,5 In an extremely cold environment, however, blood flow can drop to negligible levels, probably as low as 100 ml/min. In the case of extreme hypermetabolism, as occurs during exercise, blood flow can increase to 6 L/min.5 In the ...
... blood flow to the skin—on the order of 300 ml/min in a 60 kg subject.4,5 In an extremely cold environment, however, blood flow can drop to negligible levels, probably as low as 100 ml/min. In the case of extreme hypermetabolism, as occurs during exercise, blood flow can increase to 6 L/min.5 In the ...
Unit 9 - Cardiovascular System
... Amount of blood pumped by each side (ventricle) of the heart in one minute Stroke volume (SV) Volume of blood pumped by each ventricle in one contraction (each heartbeat) ...
... Amount of blood pumped by each side (ventricle) of the heart in one minute Stroke volume (SV) Volume of blood pumped by each ventricle in one contraction (each heartbeat) ...
AFA Ablation for AF Booklet.indd
... within the heart can be blocked. The success of each approach varies and the type of AF you have can play a role in the options that are available. Surgical procedures also carry small but significant risks that the doctors will discuss with you. Ablation is not suitable for everybody and is current ...
... within the heart can be blocked. The success of each approach varies and the type of AF you have can play a role in the options that are available. Surgical procedures also carry small but significant risks that the doctors will discuss with you. Ablation is not suitable for everybody and is current ...
PDF
... Approximately one-third of patients have LVOT obstruction at rest, and an additional onethird develop obstruction only after provocation with exercise or other hemodynamic stressors [7]. When this pathology is accompanied by persistent heart failure symptoms despite conventional therapies, patients ...
... Approximately one-third of patients have LVOT obstruction at rest, and an additional onethird develop obstruction only after provocation with exercise or other hemodynamic stressors [7]. When this pathology is accompanied by persistent heart failure symptoms despite conventional therapies, patients ...
Role of an ATP-Sensitive Potassium Channel Opener, YM934, in
... release of CK from perfused hearts, we collected the perfusate from the hearts and measured the CK activity in the perfusate (Fig. 2, left). During the 15-min period of preischemic perfusion, CK activity in the perfusate was less than 1 nmol NADPH/min/g wet tissue regardless of the presence or absen ...
... release of CK from perfused hearts, we collected the perfusate from the hearts and measured the CK activity in the perfusate (Fig. 2, left). During the 15-min period of preischemic perfusion, CK activity in the perfusate was less than 1 nmol NADPH/min/g wet tissue regardless of the presence or absen ...
Coronary artery disease
Coronary artery disease (CAD), also known as ischemic heart disease (IHD), atherosclerotic heart disease, atherosclerotic cardiovascular disease, and coronary heart disease, is a group of diseases that includes: stable angina, unstable angina, myocardial infarction, and sudden coronary death. It is within the group of cardiovascular diseases of which it is the most common type. A common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Occasionally it may feel like heartburn. Usually symptoms occur with exercise or emotional stress, last less than a few minutes, and gets better with rest. Shortness of breath may also occur and sometimes no symptoms are present. The first sign is occasionally a heart attack. Other complications include heart failure or an irregular heartbeat.Risk factors include: high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol, among others. Other risks include depression. The underlying mechanism involves atherosclerosis of the arteries of the heart. A number of tests may help with diagnoses including: electrocardiogram, cardiac stress testing, coronary computed tomographic angiography, and coronary angiogram, among others.Prevention is by eating a healthy diet, regular exercise, maintaining a healthy weight and not smoking. Sometimes medication for diabetes, high cholesterol, or high blood pressure are also used. There is limited evidence for screening people who are at low risk and do not have symptoms. Treatment involves the same measures as prevention. Additional medications such as antiplatelets including aspirin, beta blockers, or nitroglycerin may be recommended. Procedures such as percutaneous coronary intervention (PCI) or coronary artery bypass surgery (CABG) may be used in severe disease. In those with stable CAD it is unclear if PCI or CABG in addition to the other treatments improve life expectancy or decreases heart attack risk.In 2013 CAD was the most common cause of death globally, resulting in 8.14 million deaths (16.8%) up from 5.74 million deaths (12%) in 1990. The risk of death from CAD for a given age has decreased between 1980 and 2010 especially in the developed world. The number of cases of CAD for a given age has also decreased between 1990 and 2010. In the United States in 2010 about 20% of those over 65 had CAD, while it was present in 7% of those 45 to 64, and 1.3% of those 18 to 45. Rates are higher among men than women of a given age.