New Insights into Mechanisms of Atrial Fibrillation
... Specialized cardiac cells associated with pacemaking, resembling pale (P) and Purkinje cells, have been observed in the pulmonary veins in rats, dogs and humans (Wit and Boyden 2007). These cells might be residua of the embryonic myocardium. Developmental studies have shown that the complicated loop ...
... Specialized cardiac cells associated with pacemaking, resembling pale (P) and Purkinje cells, have been observed in the pulmonary veins in rats, dogs and humans (Wit and Boyden 2007). These cells might be residua of the embryonic myocardium. Developmental studies have shown that the complicated loop ...
Vitamin E Nicotinate
... disease, Parkinson’s disease, and ataxia with vitamin E deficiency. Generally, supplementation appears to be beneficial in diseases in which vitamin E deficiency is being remedied, and does not appear to be beneficial in supraphysiological doses in patients with normal vitamin E levels; indeed, it m ...
... disease, Parkinson’s disease, and ataxia with vitamin E deficiency. Generally, supplementation appears to be beneficial in diseases in which vitamin E deficiency is being remedied, and does not appear to be beneficial in supraphysiological doses in patients with normal vitamin E levels; indeed, it m ...
Pradyot Saklani, Andrew Krahn and George Klein Syncope doi
... Severe structural or coronary artery disease: Heart failure, previous myocardial infarction, low left ventricular ejection fraction ECG features of arrhythmic syncope: Bifascicular block (complete LBBB, RBBB with left hemifasciclar block) or other interventricular conduction delay with QRS duration ...
... Severe structural or coronary artery disease: Heart failure, previous myocardial infarction, low left ventricular ejection fraction ECG features of arrhythmic syncope: Bifascicular block (complete LBBB, RBBB with left hemifasciclar block) or other interventricular conduction delay with QRS duration ...
Mechanisms of Long-Duration Ventricular€Fibrillation in Human
... most often localizing to regions with greater fibrosis (6,7). In the clinical setting, it is at these earlier phases of cardiac arrest (SDVF) that pharmacological therapies to improve defibrillation efficacy have been studied (8,9). If VF is maintained by different mechanisms as the rhythm progresses o ...
... most often localizing to regions with greater fibrosis (6,7). In the clinical setting, it is at these earlier phases of cardiac arrest (SDVF) that pharmacological therapies to improve defibrillation efficacy have been studied (8,9). If VF is maintained by different mechanisms as the rhythm progresses o ...
Atrial Electric Signal During Sinus Rhythm in Lone
... The results showed that MCG mapping is an accurate noninvasive method to detect atrial electrophysiologic properties in patients with AF and healthy subjects. The duration of the high frequency component of the atrial magnetic signal, representing atrial depolarization, and several parameters descri ...
... The results showed that MCG mapping is an accurate noninvasive method to detect atrial electrophysiologic properties in patients with AF and healthy subjects. The duration of the high frequency component of the atrial magnetic signal, representing atrial depolarization, and several parameters descri ...
Cardiac Radiology
... 1) Prospective cardiac CT imaging prospective CCTA significantly reduces CT dose compared with retrospective CCTA ECGtriggered mA modulation further reduces dose multiple scans may be possible within 1 heart beat for best phase selection and functional information2) Factors in CCTA affecting dose re ...
... 1) Prospective cardiac CT imaging prospective CCTA significantly reduces CT dose compared with retrospective CCTA ECGtriggered mA modulation further reduces dose multiple scans may be possible within 1 heart beat for best phase selection and functional information2) Factors in CCTA affecting dose re ...
Scorpion Sting REVIEW ARTICLE Dr. H.S.Bawaskar Dr. P.H.Bawaskar
... ECG. Sinus bradycardia seen in early hypertensive cases with heart rate 42-60 per minute which persisted for 3-4 hours, ventricular premature contraction, couplets, transient runs of ventricular tachycardia and rarely a fatal lethal ventricular arrhythmia, sinus tachycardia, injury to conducting sys ...
... ECG. Sinus bradycardia seen in early hypertensive cases with heart rate 42-60 per minute which persisted for 3-4 hours, ventricular premature contraction, couplets, transient runs of ventricular tachycardia and rarely a fatal lethal ventricular arrhythmia, sinus tachycardia, injury to conducting sys ...
Intercapillary Distance and Capillary Reserve in
... view has been challenged by recent studies based on different histological methods which purport to show that capillaries proliferate in pathological hypertrophy.3"5 However, it seems likely that capillary growth is not proportional to hypertrophy of the muscle fibers.1"3'5>(i All such studies to da ...
... view has been challenged by recent studies based on different histological methods which purport to show that capillaries proliferate in pathological hypertrophy.3"5 However, it seems likely that capillary growth is not proportional to hypertrophy of the muscle fibers.1"3'5>(i All such studies to da ...
Frequently Asked Questions About AEDs
... the heart. Built-in computers assess the patient's heart rhythm, judge whether defibrillation is needed, and then administer the shock. Audible and/or visual prompts guide the user through the process. 3. How does an AED work? A microprocessor inside the defibrillator interprets (analyzes) the victi ...
... the heart. Built-in computers assess the patient's heart rhythm, judge whether defibrillation is needed, and then administer the shock. Audible and/or visual prompts guide the user through the process. 3. How does an AED work? A microprocessor inside the defibrillator interprets (analyzes) the victi ...
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 ...
Intercapillary Distance and Capillary Reserve in Hypertrophied Rat
... view has been challenged by recent studies based on different histological methods which purport to show that capillaries proliferate in pathological hypertrophy.3"5 However, it seems likely that capillary growth is not proportional to hypertrophy of the muscle fibers.1"3'5>(i All such studies to da ...
... view has been challenged by recent studies based on different histological methods which purport to show that capillaries proliferate in pathological hypertrophy.3"5 However, it seems likely that capillary growth is not proportional to hypertrophy of the muscle fibers.1"3'5>(i All such studies to da ...
3D Echocardiography: A Review of the Current Status and Future
... accuracy, and expanding capabilities. As a result, more and improved imaging modalities are available for evaluating cardiac anatomy, ventricular function, blood flow velocity, and valvular diseases. Threedimensional (3D) echocardiography offers the ability to improve and expand the diagnostic capab ...
... accuracy, and expanding capabilities. As a result, more and improved imaging modalities are available for evaluating cardiac anatomy, ventricular function, blood flow velocity, and valvular diseases. Threedimensional (3D) echocardiography offers the ability to improve and expand the diagnostic capab ...
The AV junction region of the heart: a comprehensive - AJP
... the medial aspect of the coronary sinus wall (Fig. 4, C–F). The trajectory of the medial atrionodal bundle along the epicardium of the superoposterior medial atrial wall is to the terminal right limb of the crista terminalis at the level of the superior lip of the coronary sinus ostium and the poste ...
... the medial aspect of the coronary sinus wall (Fig. 4, C–F). The trajectory of the medial atrionodal bundle along the epicardium of the superoposterior medial atrial wall is to the terminal right limb of the crista terminalis at the level of the superior lip of the coronary sinus ostium and the poste ...
CHAPTER 28 Three-Dimensional Echocardiographic Guidance of
... provides distinct advantages that may enhance both the safety of the puncture procedure and the success of the subsequent percutaneous intervention in the left heart. Among the several modalities of 3D TEE, biplane and 3D zoom imaging are particularly useful in guiding the transseptal puncture. Th ...
... provides distinct advantages that may enhance both the safety of the puncture procedure and the success of the subsequent percutaneous intervention in the left heart. Among the several modalities of 3D TEE, biplane and 3D zoom imaging are particularly useful in guiding the transseptal puncture. Th ...
Regulation of atrial natriuretic peptide
... immersion (Epstein et al., 1989), in clinical conditions such as heart failure (Tikkanen et al., 1985) and renal failure (Rascher et al., 1985). Rate of contraction has been suggested to stimulate ANP secretion (Schiebinger and Linden, 1986). ANP secretion is substantially augmented in experimental ...
... immersion (Epstein et al., 1989), in clinical conditions such as heart failure (Tikkanen et al., 1985) and renal failure (Rascher et al., 1985). Rate of contraction has been suggested to stimulate ANP secretion (Schiebinger and Linden, 1986). ANP secretion is substantially augmented in experimental ...
B-Type Natriuretic Peptide
... must include development of analytically sensitive and specific immunoassays. The result will, however, not be straightforward owing to the hydrophobic nature of signal peptides (36 ). Moreover, the new finding raises the hypothetical question of whether intact preproBNP is an existing peptide. Beca ...
... must include development of analytically sensitive and specific immunoassays. The result will, however, not be straightforward owing to the hydrophobic nature of signal peptides (36 ). Moreover, the new finding raises the hypothetical question of whether intact preproBNP is an existing peptide. Beca ...
The Effect of PEEP on Cardiac Output
... (PEEP) is well established as an integral part ofthe management of patients with the adult respiratory distress syndrome. While PEEP improves pulmonary gas exchange in the majority of patients, it may also decrease cardiac output.’5 As a result, oxygen transport (cardiac output x arterial oxygen con ...
... (PEEP) is well established as an integral part ofthe management of patients with the adult respiratory distress syndrome. While PEEP improves pulmonary gas exchange in the majority of patients, it may also decrease cardiac output.’5 As a result, oxygen transport (cardiac output x arterial oxygen con ...
The Effect of PEEP on Cardiac Output
... (PEEP) is well established as an integral part ofthe management of patients with the adult respiratory distress syndrome. While PEEP improves pulmonary gas exchange in the majority of patients, it may also decrease cardiac output.’5 As a result, oxygen transport (cardiac output x arterial oxygen con ...
... (PEEP) is well established as an integral part ofthe management of patients with the adult respiratory distress syndrome. While PEEP improves pulmonary gas exchange in the majority of patients, it may also decrease cardiac output.’5 As a result, oxygen transport (cardiac output x arterial oxygen con ...
Isolated Heart Perfusion Systems
... upgrade with the Working Heart (also known as Ejecting Heart) perfusion pathway*. This enables orthograde perfusion: entering the left atrium, flowing through the left ventricle and exiting the aorta. In this way, a more physiological assay of ventricular contractility is possible as the left ventri ...
... upgrade with the Working Heart (also known as Ejecting Heart) perfusion pathway*. This enables orthograde perfusion: entering the left atrium, flowing through the left ventricle and exiting the aorta. In this way, a more physiological assay of ventricular contractility is possible as the left ventri ...
Print - Circulation Research
... 16). However, no plateau of actively developed tension is observed in cardiac muscle; instead, active tension decreases rapidly at sarcomere lengths both above and below 2.20// (Fig. 4). A 10% reduction in sarcomere length from 2.20/1 to 2.00/1 results in a 30% decrease in developed tension (Fig. 4) ...
... 16). However, no plateau of actively developed tension is observed in cardiac muscle; instead, active tension decreases rapidly at sarcomere lengths both above and below 2.20// (Fig. 4). A 10% reduction in sarcomere length from 2.20/1 to 2.00/1 results in a 30% decrease in developed tension (Fig. 4) ...
2016 ESC Guidelines for the management of atrial fibrillation
... the time of their publication. The ESC is not responsible in the event of any contradiction, discrepancy and/or ambiguity between the ESC Guidelines and any other official recommendations or guidelines issued by the relevant public health authorities, in particular in relation to good use of healthc ...
... the time of their publication. The ESC is not responsible in the event of any contradiction, discrepancy and/or ambiguity between the ESC Guidelines and any other official recommendations or guidelines issued by the relevant public health authorities, in particular in relation to good use of healthc ...
Congenital Aneurysm of the Sinus of Valsalva
... • This aorto–right atrial communication behaves like a left-to-right shunt at the atrial level. • The most common symptoms were shortness of breath, palpitation, and recurrent respiratory tract infections. • On physical examination, all patients had a continuous murmur at the right parasternal borde ...
... • This aorto–right atrial communication behaves like a left-to-right shunt at the atrial level. • The most common symptoms were shortness of breath, palpitation, and recurrent respiratory tract infections. • On physical examination, all patients had a continuous murmur at the right parasternal borde ...
Cardiac Surgery Simulation Curriculum
... Richard H. Feins, M.D., University of North Carolina at Chapel Hill, Chapel Hill, NC (Principal Investigator) Harold M. Burkhart, M.D., Mayo Clinic, Rochester, MN Daniel N. Coore, Ph.D., University of the West Indies, Mona, Jamaica John V. Conte, M.D., Johns Hopkins University, Baltimore, MD James I ...
... Richard H. Feins, M.D., University of North Carolina at Chapel Hill, Chapel Hill, NC (Principal Investigator) Harold M. Burkhart, M.D., Mayo Clinic, Rochester, MN Daniel N. Coore, Ph.D., University of the West Indies, Mona, Jamaica John V. Conte, M.D., Johns Hopkins University, Baltimore, MD James I ...
2016 ESC Guidelines for the management of atrial fibrillation
... the time of their publication. The ESC is not responsible in the event of any contradiction, discrepancy and/or ambiguity between the ESC Guidelines and any other official recommendations or guidelines issued by the relevant public health authorities, in particular in relation to good use of healthc ...
... the time of their publication. The ESC is not responsible in the event of any contradiction, discrepancy and/or ambiguity between the ESC Guidelines and any other official recommendations or guidelines issued by the relevant public health authorities, in particular in relation to good use of healthc ...
Management of acute coronary syndrome
Management of acute coronary syndrome is targeted against the effects of reduced blood flow to the afflicted area of the heart muscle, usually because of a blood clot in one of the coronary arteries, the vessels that supply oxygenated blood to the myocardium. This is achieved with urgent hospitalization and medical therapy, including drugs that relieve chest pain and reduce the size of the infarct, and drugs that inhibit clot formation; for a subset of patients invasive measures are also employed (coronary angiography and percutaneous coronary intervention). Basic principles of management are the same for all types of acute coronary syndrome. However, some important aspects of treatment depend on the presence or absence of elevation of the ST segment on the electrocardiogram, which classifies cases upon presentation to either ST segment elevation myocardial infarction (STEMI) or non-ST elevation acute coronary syndrome (NST-ACS); the latter includes unstable angina and non-ST elevation myocardial infarction (NSTEMI). Treatment is generally more aggressive for STEMI patients, and reperfusion therapy is more often reserved for them. Long term therapy is necessary for prevention of recurrent events and complications.