Fibrillation and defibrillation of the heart
... after approximately 12–15 min, fibrillation waves fade to become a flat isoelectric line.13 53 64 Secondary VF occurs in the presence of shock or cardiac failure and is caused by a variety of mechanisms, including dilatation, stretching, metabolic disorders, sympathetic overactivity and proarrhythmo ...
... after approximately 12–15 min, fibrillation waves fade to become a flat isoelectric line.13 53 64 Secondary VF occurs in the presence of shock or cardiac failure and is caused by a variety of mechanisms, including dilatation, stretching, metabolic disorders, sympathetic overactivity and proarrhythmo ...
the postmortem rigor of the mammalian heart and the influence of an
... cardiac rigor and some slow and rapid oscillations occur in some hearts during the course of rigor. An extensive investigation on post-mortem changes in the form of the heart was carried out by J. Rothberger,' 1903. He examined the hearts of two hundred dogs which were killed in various ways or whic ...
... cardiac rigor and some slow and rapid oscillations occur in some hearts during the course of rigor. An extensive investigation on post-mortem changes in the form of the heart was carried out by J. Rothberger,' 1903. He examined the hearts of two hundred dogs which were killed in various ways or whic ...
CURRICULUM VITAE John Alex Elefteriades, M.D. Date of Revision
... of the Connecticut Chapter of the American College of Cardiology and member of the national Board of Governors of the College. Dr. Elefteriades is also past President of the International College of Angiology. He serves on the editorial board of the American Journal of Cardiology, the Journal of Car ...
... of the Connecticut Chapter of the American College of Cardiology and member of the national Board of Governors of the College. Dr. Elefteriades is also past President of the International College of Angiology. He serves on the editorial board of the American Journal of Cardiology, the Journal of Car ...
BVS stent (Abbott Vascular)
... – No remaining prosthesis therefore enabling future revascularization without the increased MACE associated with treating an “in-stent restenosis”; no “full metal jacket” – Potential for applications such as angiogenesis and gene transfer – Compatibility with non-invasive imaging modalities (CTA and ...
... – No remaining prosthesis therefore enabling future revascularization without the increased MACE associated with treating an “in-stent restenosis”; no “full metal jacket” – Potential for applications such as angiogenesis and gene transfer – Compatibility with non-invasive imaging modalities (CTA and ...
Benefits and Risks of Sauna Bathing
... prospective study of 12,310 Finnish men and women 30 to 59 years old, there were 77 sudden coronary deaths during the 6-year follow-up period but only 2 of these occurred in saunas (26). Experimental studies suggest that sauna bathing is well tolerated by patients with stable coronary heart disease ...
... prospective study of 12,310 Finnish men and women 30 to 59 years old, there were 77 sudden coronary deaths during the 6-year follow-up period but only 2 of these occurred in saunas (26). Experimental studies suggest that sauna bathing is well tolerated by patients with stable coronary heart disease ...
Atrial fibrillation and flutter
... The rhythm control strategy (Table 1) uses cardioversion to restore sinus rhythm. Cardioversion is most often achieved using a synchronised direct current (DC) shock applied to the chest with paddles placed over the apex and base of the heart. This procedure is performed under general anaesthesia. C ...
... The rhythm control strategy (Table 1) uses cardioversion to restore sinus rhythm. Cardioversion is most often achieved using a synchronised direct current (DC) shock applied to the chest with paddles placed over the apex and base of the heart. This procedure is performed under general anaesthesia. C ...
Print - Circulation Research
... four interventions altered baseline levels of the variables being monitored. Paired t tests were also used to compare initial values with peak values to determine whether antigen challenge caused a significant change in the variable. Determination of differences in peak values between control and tr ...
... four interventions altered baseline levels of the variables being monitored. Paired t tests were also used to compare initial values with peak values to determine whether antigen challenge caused a significant change in the variable. Determination of differences in peak values between control and tr ...
Depolarization and Repolarization
... of >1mm and longer than 80 milliseconds following the Jpoint. This measure has a false positive rate of 15-20% (which is slightly higher in women than men) and a false negative rate of 20-30%. • ST depression may be associated with hypokalemia or digitalis toxicity. ...
... of >1mm and longer than 80 milliseconds following the Jpoint. This measure has a false positive rate of 15-20% (which is slightly higher in women than men) and a false negative rate of 20-30%. • ST depression may be associated with hypokalemia or digitalis toxicity. ...
PowerPoint - Cardiovascular Radiology
... Thoracic Rads - Normal Normal cats change with age • Long axis of the heart is more horizontal in old cats (40%) • Aortic bulge develops (30%) – Not due to hypertension or hyperthyroidism – At the aortic isthmus – Cardiac measurements in young & old cats are the same, despite these conformational c ...
... Thoracic Rads - Normal Normal cats change with age • Long axis of the heart is more horizontal in old cats (40%) • Aortic bulge develops (30%) – Not due to hypertension or hyperthyroidism – At the aortic isthmus – Cardiac measurements in young & old cats are the same, despite these conformational c ...
Fetal Arrhythmias: A Clinical Review
... postnatal ECG has been determined to be prolonged. Extrasystoles are most common cause of fetal arrhythmias, and are most often premature atrial contractions (PACs), what are usually identified in third trimester fetuses and their frequency may be highly variable. These are usually benign, resolving ...
... postnatal ECG has been determined to be prolonged. Extrasystoles are most common cause of fetal arrhythmias, and are most often premature atrial contractions (PACs), what are usually identified in third trimester fetuses and their frequency may be highly variable. These are usually benign, resolving ...
Document
... More accuracy and precision over CG equation Validated for Af American, DM CKD and Tx Recipient Not validated in Elderly, Pregnant women and Children Underestimate GFR in patients with normal GFR (Type 1 DM and Kidney Donors) ...
... More accuracy and precision over CG equation Validated for Af American, DM CKD and Tx Recipient Not validated in Elderly, Pregnant women and Children Underestimate GFR in patients with normal GFR (Type 1 DM and Kidney Donors) ...
Circa- and ultradians in the occurrence of simple extrasystoles in
... subjects. Therefore, our sample may consist of “really healthy“ male subjects compared to some other studies (e.g. 9, 13, 20, 22). In those studies were displayed also long pauses, multiform extrasystoles, bigeminy or ventricular tachycardia in very old persons. But no attempts to exclude silent myo ...
... subjects. Therefore, our sample may consist of “really healthy“ male subjects compared to some other studies (e.g. 9, 13, 20, 22). In those studies were displayed also long pauses, multiform extrasystoles, bigeminy or ventricular tachycardia in very old persons. But no attempts to exclude silent myo ...
Treatment and management of mitral regurgitation
... fraction <60% (class IB indication),7,8 or a combination thereof. In asymptomatic patients with preserved LV function, surgery should be performed in the presence of newonset atrial fibrillation, pulmonary hypertension (defined as a pulmonary artery systolic pressure >50 mmHg at rest or >60 mmHg wit ...
... fraction <60% (class IB indication),7,8 or a combination thereof. In asymptomatic patients with preserved LV function, surgery should be performed in the presence of newonset atrial fibrillation, pulmonary hypertension (defined as a pulmonary artery systolic pressure >50 mmHg at rest or >60 mmHg wit ...
Accepted version - QMRO Home
... M2-like macrophages were present in the adult murine heart and were predominantly increased in the infarct area post-MI with exhibiting strengthened reparative abilities. We confirmed that the left ventricular (LV) myocardium of adult mice contained CD11b+F4/80+ macrophages, greater than 90% of whic ...
... M2-like macrophages were present in the adult murine heart and were predominantly increased in the infarct area post-MI with exhibiting strengthened reparative abilities. We confirmed that the left ventricular (LV) myocardium of adult mice contained CD11b+F4/80+ macrophages, greater than 90% of whic ...
Paroxysmal Supraventricular Tachycardia with QRS Duration
... the occurrence of a higher arterial pressure (Figure 2A). We originally proposed that the mechanoelectric feedback (a higher pressure resulted in a shorter action potential duration and effective refractory period) modulated the regional electrophysiologic characteristics in the right bundle branch, ...
... the occurrence of a higher arterial pressure (Figure 2A). We originally proposed that the mechanoelectric feedback (a higher pressure resulted in a shorter action potential duration and effective refractory period) modulated the regional electrophysiologic characteristics in the right bundle branch, ...
Effects of a Left Ventricular Assist Device with a Centrifugal Pump on
... 235±34 msec), and control and 75% assist (329±43 versus 210±39 msec). In the left ventricular filling phase, negative left ventricular pressure was observed in the 50% assist group and 75% assist group, implying the atrioventricular pressure gradient increased with the assist rate (Fig. 2). These fi ...
... 235±34 msec), and control and 75% assist (329±43 versus 210±39 msec). In the left ventricular filling phase, negative left ventricular pressure was observed in the 50% assist group and 75% assist group, implying the atrioventricular pressure gradient increased with the assist rate (Fig. 2). These fi ...
Arrhythmogenic right ventricular cardiomyopathy (ARVC
... cardiomyopathy and a frequent cause of sudden death in the young. Affected individuals typically present between the second and fourth decade of life with arrhythmias coming from the right ventricle. Pathogenic mutations in genes encoding the cardiac desmosome can be found in approximately 60% of in ...
... cardiomyopathy and a frequent cause of sudden death in the young. Affected individuals typically present between the second and fourth decade of life with arrhythmias coming from the right ventricle. Pathogenic mutations in genes encoding the cardiac desmosome can be found in approximately 60% of in ...
Squatting test a dynamic postural manoeuvre OCR
... decrease in systolic BP, diastolic BP and mean BP by 14.6, 10.6 and 13.9 mmHg, respectively. Mean BP reached a minimum of 57.8 mmHg after 7 s. Thereafter, the BP increased to a new level within about 15 s. Most subjects demonstrated a biphasic HR response. The maximum HR was reached after 11 s of st ...
... decrease in systolic BP, diastolic BP and mean BP by 14.6, 10.6 and 13.9 mmHg, respectively. Mean BP reached a minimum of 57.8 mmHg after 7 s. Thereafter, the BP increased to a new level within about 15 s. Most subjects demonstrated a biphasic HR response. The maximum HR was reached after 11 s of st ...
Squatting test: a dynamic postural manoeuvre to study
... decrease in systolic BP, diastolic BP and mean BP by 14.6, 10.6 and 13.9 mmHg, respectively. Mean BP reached a minimum of 57.8 mmHg after 7 s. Thereafter, the BP increased to a new level within about 15 s. Most subjects demonstrated a biphasic HR response. The maximum HR was reached after 11 s of st ...
... decrease in systolic BP, diastolic BP and mean BP by 14.6, 10.6 and 13.9 mmHg, respectively. Mean BP reached a minimum of 57.8 mmHg after 7 s. Thereafter, the BP increased to a new level within about 15 s. Most subjects demonstrated a biphasic HR response. The maximum HR was reached after 11 s of st ...
updated imaging guidelines for nuclear cardiology procedures
... SPECT Imaging. SPECT detectors are basically sophisticated scintillation cameras mounted on a gantry. Many variables dictate the performance of a SPECT imaging system. The number of detectors is perhaps the most important variable. Single-head cameras have been used widely for cardiac imaging. Addin ...
... SPECT Imaging. SPECT detectors are basically sophisticated scintillation cameras mounted on a gantry. Many variables dictate the performance of a SPECT imaging system. The number of detectors is perhaps the most important variable. Single-head cameras have been used widely for cardiac imaging. Addin ...
Impaired myocardial capillarogenesis and increased
... since plastic embedding does not lead to tissue shrinkage and capillaries can easily be identified and counted.31 In the present study, using electron microscopy on ultrathin sections we could exclude collapse of myocardial capillaries after perfusion fixation. Statistics ...
... since plastic embedding does not lead to tissue shrinkage and capillaries can easily be identified and counted.31 In the present study, using electron microscopy on ultrathin sections we could exclude collapse of myocardial capillaries after perfusion fixation. Statistics ...
AHA/ASA Guideline
... with placebo in high-risk persons and found a 24% risk reduction (95% CI, 5 to 40) for stroke, MI, or vascular death among the 1013 patients with a history of stroke or TIA.14 Although the BP-lowering effect as measured during the study was minimal (average, 3/2 mm Hg), it may have been related to t ...
... with placebo in high-risk persons and found a 24% risk reduction (95% CI, 5 to 40) for stroke, MI, or vascular death among the 1013 patients with a history of stroke or TIA.14 Although the BP-lowering effect as measured during the study was minimal (average, 3/2 mm Hg), it may have been related to t ...
- Wiley Online Library
... a within (repeated) variable.i When there was a significant timetreatment interaction, differences in groups were evaluated at specific times using a 2-group Student’s t-test. A significant difference was defined as P o .05 for the ANOVA and P o .025 for the treatment group comparisons at the 2 nonzero ...
... a within (repeated) variable.i When there was a significant timetreatment interaction, differences in groups were evaluated at specific times using a 2-group Student’s t-test. A significant difference was defined as P o .05 for the ANOVA and P o .025 for the treatment group comparisons at the 2 nonzero ...
Adrenergic and Muscarinic Receptors in the Human Heart
... (Kissling et al., 1997; Peters et al., 1998). The mechanism of the positive inotropic effect induced by a1-adrenoceptor stimulation is still a matter of debate: a1-adrenoceptor stimulation causes formation of 1,4,5inositoltrisphosphate and diacylglycerol, with the former mediating release of Ca21 fr ...
... (Kissling et al., 1997; Peters et al., 1998). The mechanism of the positive inotropic effect induced by a1-adrenoceptor stimulation is still a matter of debate: a1-adrenoceptor stimulation causes formation of 1,4,5inositoltrisphosphate and diacylglycerol, with the former mediating release of Ca21 fr ...
Vasoreactive Response to Maternal Hyperoxygenation in the Fetus
... minutes. This protocol for MH has been previously established as an effective means for delivering supplemental oxygen to the fetus.15 The fetal echocardiogram was repeated while the mother was breathing 60% oxygen, and the study parameters listed above were recorded. Oxygen was then discontinued fo ...
... minutes. This protocol for MH has been previously established as an effective means for delivering supplemental oxygen to the fetus.15 The fetal echocardiogram was repeated while the mother was breathing 60% oxygen, and the study parameters listed above were recorded. Oxygen was then discontinued fo ...
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.