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... in an ellipse-like curve representing the size and shape of the “mean” intertrabecular space. This approach gives the same results as the original method (Cowin, 1986), in which the dissector is rotated and the total length of intercepts with intertrabecular spaces in each direction is divided by th ...
... in an ellipse-like curve representing the size and shape of the “mean” intertrabecular space. This approach gives the same results as the original method (Cowin, 1986), in which the dissector is rotated and the total length of intercepts with intertrabecular spaces in each direction is divided by th ...
Human coronary sinus — from Galen to modern times
... valve of inferior vena cava; Giulio Aranzio (1530–1589) described fetal vessels; Fabricius ab Aquapendente (1537–1617) described the valves of peripheral veins, although he did not recognize their function; Leonardo Botallo (1530–1600) discovered and described ductus arteriosus. Role of venous valve ...
... valve of inferior vena cava; Giulio Aranzio (1530–1589) described fetal vessels; Fabricius ab Aquapendente (1537–1617) described the valves of peripheral veins, although he did not recognize their function; Leonardo Botallo (1530–1600) discovered and described ductus arteriosus. Role of venous valve ...
Bidirectional ventricular tachycardia associated with digoxin toxicity
... foci with different rate thresholds for delayed afterdepolarization–induced ventricular bigeminy needed to be present. Because the ventricular rate exceeded the lower threshold, ventricular bigeminy would develop. This would effectively double the heart rate, taking the overall ventricular rate abov ...
... foci with different rate thresholds for delayed afterdepolarization–induced ventricular bigeminy needed to be present. Because the ventricular rate exceeded the lower threshold, ventricular bigeminy would develop. This would effectively double the heart rate, taking the overall ventricular rate abov ...
The Correlation between Right Descending Pulmonary Artery
... confirmed in the past few decades.13-15 However, there are still some methodologic issues which should be taken into consideration. The first issue is that the atrial pressure at the time of peak transtricuspid flow could not be precisely measured by echocardiography. Second, poorly detectable tricu ...
... confirmed in the past few decades.13-15 However, there are still some methodologic issues which should be taken into consideration. The first issue is that the atrial pressure at the time of peak transtricuspid flow could not be precisely measured by echocardiography. Second, poorly detectable tricu ...
Valvular Heart Disease in Patients with Prolactinomas on
... cabergoline (28.6%) but not in patients taking non-ergot (0%) dopamine agonists, as compared to subjects controls (5.6%). The relative risk for moderate to severe valve regurgitation in the pergolide group was 6.3 for mitral regurgitation (P=0.008), 4.2 for aortic regurgitation (P=0.01), and 5.6 for ...
... cabergoline (28.6%) but not in patients taking non-ergot (0%) dopamine agonists, as compared to subjects controls (5.6%). The relative risk for moderate to severe valve regurgitation in the pergolide group was 6.3 for mitral regurgitation (P=0.008), 4.2 for aortic regurgitation (P=0.01), and 5.6 for ...
ACLS Rhythms for the ACLS Algorithms
... A — Normal impulse comes down Purkinje fibers to join muscle fibers. B — One impulse (B1) encounters an area of one-way (unidirectional) block (B2) and stops. C — Meanwhile, the normally conducted impulse (C1) has moved down the Purkinje fiber, into the muscle fiber (C2); and as a retrograde impulse ...
... A — Normal impulse comes down Purkinje fibers to join muscle fibers. B — One impulse (B1) encounters an area of one-way (unidirectional) block (B2) and stops. C — Meanwhile, the normally conducted impulse (C1) has moved down the Purkinje fiber, into the muscle fiber (C2); and as a retrograde impulse ...
Variations in the Number and Morphology of Cusps of the Tricuspid
... regurgitation (TR) after mitral valve replacement in rheumatic heart disease is a serious clinical problem. If it occurs or progresses late after mitral valve surgery, tricuspid valve annuloplasty or replacement may be performed with satisfactory results. Tricuspid valve regurgitation can also resul ...
... regurgitation (TR) after mitral valve replacement in rheumatic heart disease is a serious clinical problem. If it occurs or progresses late after mitral valve surgery, tricuspid valve annuloplasty or replacement may be performed with satisfactory results. Tricuspid valve regurgitation can also resul ...
patent ductus arteriosus with pulmonary hypertension - Heart
... cyanosis was so marked as to be discernable by them. The symptoms described above occurred with such frequency in patients with this anomaly as to be considered characteristic of it, but they are not pathognomonic of it since similar symptoms are a feature of other congenital defects such as atrial ...
... cyanosis was so marked as to be discernable by them. The symptoms described above occurred with such frequency in patients with this anomaly as to be considered characteristic of it, but they are not pathognomonic of it since similar symptoms are a feature of other congenital defects such as atrial ...
narrow-qrs tachycardias
... is less time for the ventricles to fill and less blood for the ventricles to pump out with each contraction. This can lead to decreased cardiac output. Because the coronary arteries fill when the ventricles are at rest, rapid heart rates decrease the time for coronary artery filling. This decreases ...
... is less time for the ventricles to fill and less blood for the ventricles to pump out with each contraction. This can lead to decreased cardiac output. Because the coronary arteries fill when the ventricles are at rest, rapid heart rates decrease the time for coronary artery filling. This decreases ...
Genetics - Circulation
... litters were counted up to at least 100 animals. Statistically significant deviation was defined in a 2 test by P⬍0.05. The incidences of specific types of heart defects in crosses were compared by a 2-tailed Fisher exact test. The coincidence of heart defects in the same mouse was evaluated by com ...
... litters were counted up to at least 100 animals. Statistically significant deviation was defined in a 2 test by P⬍0.05. The incidences of specific types of heart defects in crosses were compared by a 2-tailed Fisher exact test. The coincidence of heart defects in the same mouse was evaluated by com ...
In Vivo Measurements of Atrial Repolarization Alternans
... It has been shown that repolarization alternans, a beatto-beat alternation in action potential duration, enhances dispersion of repolarization above a critical heart rate and promotes susceptibility to ventricular arrhythmias. It is unknown whether repolarization alternans is measurable in the atria ...
... It has been shown that repolarization alternans, a beatto-beat alternation in action potential duration, enhances dispersion of repolarization above a critical heart rate and promotes susceptibility to ventricular arrhythmias. It is unknown whether repolarization alternans is measurable in the atria ...
Sonometric Study of the Normal Tricuspid Valve Annulus in Sheep
... and sequential from base to apex. ...
... and sequential from base to apex. ...
The Atrial Coronary Arteries in Man
... left and right atria. Our findings suggest that this is not always true, and would support the use of a different type of nomenclature. Of these small and numerous atrial arteries, 2 groups were less variable than the others. The first of these was the group in the region of the margo acutus, simila ...
... left and right atria. Our findings suggest that this is not always true, and would support the use of a different type of nomenclature. Of these small and numerous atrial arteries, 2 groups were less variable than the others. The first of these was the group in the region of the margo acutus, simila ...
Fetal Diagnosis and Treatment of
... Family Hx of left sided cardiac lesions (HLHS) Identification of other congenital malformation Identification of chromosomal abnormalities Abnormal fetal growth or evidence of fetal distress Exposure to a known Teratogen (Lithium, Alcohol, ...
... Family Hx of left sided cardiac lesions (HLHS) Identification of other congenital malformation Identification of chromosomal abnormalities Abnormal fetal growth or evidence of fetal distress Exposure to a known Teratogen (Lithium, Alcohol, ...
Theme: «CARDIAC INSUFFICIENCY»
... A Myocardium hypertrophy B Tachycardia C Rise of arterial pressure D Dyspnea E Cyanosis 3. A patient ill with essential arterial hypertension had a hypertensic crisis that resulted in an attack of cardiac asthma. What is the leading mechanism of cardiac insufficiency in this case? A Heart overload c ...
... A Myocardium hypertrophy B Tachycardia C Rise of arterial pressure D Dyspnea E Cyanosis 3. A patient ill with essential arterial hypertension had a hypertensic crisis that resulted in an attack of cardiac asthma. What is the leading mechanism of cardiac insufficiency in this case? A Heart overload c ...
Pulmonary artery and right ventricle function in
... pulmonary artery (PA) has shown the same histological degeneration in BAV patients, especially after application of Ross procedure.[7] Some studies indicate that BAV patients have drastic changes in both the ascending aorta and medial layer of the pulmonary trunk earlier than patients with tricuspid ...
... pulmonary artery (PA) has shown the same histological degeneration in BAV patients, especially after application of Ross procedure.[7] Some studies indicate that BAV patients have drastic changes in both the ascending aorta and medial layer of the pulmonary trunk earlier than patients with tricuspid ...
Assessment of valvular regurgitation. Part 1: aortic and pulmonary
... reliable than for LV. In experimented laboratories, 3D echocardiography has shown to be as accurate as MRI for the assessment of RV volumes.9 As for the LV, the RV ejection fraction is a crude estimate of the RV function. Emerging techniques (i.e. tissue Doppler velocities or strain) could provide n ...
... reliable than for LV. In experimented laboratories, 3D echocardiography has shown to be as accurate as MRI for the assessment of RV volumes.9 As for the LV, the RV ejection fraction is a crude estimate of the RV function. Emerging techniques (i.e. tissue Doppler velocities or strain) could provide n ...
Impairment of coronary flow reserve in aortic stenosis
... circulation to increase flow to match myocardial oxygen demand. The reduction of CFR is the key factor responsible for myocardial ischemia in AS patients, and this may contribute to the development of LV dysfunction, symptoms, and adverse outcomes (34). There still persist some uncertainties and con ...
... circulation to increase flow to match myocardial oxygen demand. The reduction of CFR is the key factor responsible for myocardial ischemia in AS patients, and this may contribute to the development of LV dysfunction, symptoms, and adverse outcomes (34). There still persist some uncertainties and con ...
European Association of Echocardiography recommendations for
... reliable than for LV. In experimented laboratories, 3D echocardiography has shown to be as accurate as MRI for the assessment of RV volumes.9 As for the LV, the RV ejection fraction is a crude estimate of the RV function. Emerging techniques (i.e. tissue Doppler velocities or strain) could provide n ...
... reliable than for LV. In experimented laboratories, 3D echocardiography has shown to be as accurate as MRI for the assessment of RV volumes.9 As for the LV, the RV ejection fraction is a crude estimate of the RV function. Emerging techniques (i.e. tissue Doppler velocities or strain) could provide n ...
Systolic and Diastolic Heart Failure (HFrEF and HFpEF) 2016
... • Left sided ''forward'' failure overlaps with right sided ''backward'' failure. • Most common cause of right-sided heart failure is left-sided heart failure, therefore, patients present with both sets of signs and symptoms. • Dullness of the lung fields to finger percussion and reduced breath sound ...
... • Left sided ''forward'' failure overlaps with right sided ''backward'' failure. • Most common cause of right-sided heart failure is left-sided heart failure, therefore, patients present with both sets of signs and symptoms. • Dullness of the lung fields to finger percussion and reduced breath sound ...
Hydraulic forces contribute to left ventricular diastolic filling
... important component of the total force responsible for left ventricular filling. These findings bring new insights into the physiological mechanisms governing diastolic function. The size of the LA and the LV vary during the cardiac cycle. Since the hydraulic force is proportional to the time-varyin ...
... important component of the total force responsible for left ventricular filling. These findings bring new insights into the physiological mechanisms governing diastolic function. The size of the LA and the LV vary during the cardiac cycle. Since the hydraulic force is proportional to the time-varyin ...
Idiopathic ventricular tachycardia in children
... with initially unsuccessful procedure (20). We as other authors had no major complications (complete RBBB in one child only) after RF of idiopathic VT. The follow-up study showed that no late proarrhythmic or cardiopressing impact of delivered radiofrequency energy was observed either on the right o ...
... with initially unsuccessful procedure (20). We as other authors had no major complications (complete RBBB in one child only) after RF of idiopathic VT. The follow-up study showed that no late proarrhythmic or cardiopressing impact of delivered radiofrequency energy was observed either on the right o ...
The visceral pericardium: macromolecular structure and - AJP
... LSM510 NLO META microscope. The META 32 element detector was calibrated using methods described in Jobsis et al. (14). Typically, fluorescence and second harmonic emissions were simultaneously acquired by the META multielement PMT detector and two-photon excitation at 786 nm. Collection of the fluor ...
... LSM510 NLO META microscope. The META 32 element detector was calibrated using methods described in Jobsis et al. (14). Typically, fluorescence and second harmonic emissions were simultaneously acquired by the META multielement PMT detector and two-photon excitation at 786 nm. Collection of the fluor ...
Charles Hoopes, MD - American Heart Association
... then was brought back a couple of days later for a RCA mid lesion. She arrested on insertion of the catheter in the aortic root -- never did a manipulation -- and after initial unsuccessful resuscitation, placed an impella and kept it up. They injected her L and it was open and, while still arrested ...
... then was brought back a couple of days later for a RCA mid lesion. She arrested on insertion of the catheter in the aortic root -- never did a manipulation -- and after initial unsuccessful resuscitation, placed an impella and kept it up. They injected her L and it was open and, while still arrested ...
Slide 1
... Advise surgeons to avoid proximity of cautery to PM or leads. Advise surgeons to use short, intermittent, and irregular bursts at the lowest feasible energy levels. Advise surgeons to reconsider use of bipolar electrocautery ...
... Advise surgeons to avoid proximity of cautery to PM or leads. Advise surgeons to use short, intermittent, and irregular bursts at the lowest feasible energy levels. Advise surgeons to reconsider use of bipolar electrocautery ...
Lutembacher's syndrome
Lutembacher's syndrome is a form of congenital heart disease. Lutembacher's syndrome was first described by a French cardiologist by the name of Rene' Lutembacher (1884–1968) of Paris, France in 1916. Lutembacher syndrome is a rare disease that affects one of the chambers of the heart as well as a valve of the heart. Lutembacher's syndrome is known to affect females more often than males. Lutembacher is an extremely rare disease. Lutembacher's can affect children or adults; the person can either be born with the disorder or develop it later in life.Lutembacher affects more specifically the atria of the heart and the mitral or biscupid valve. The disorder itself is known more specifically as both congenital atrial septal defect (ASD) and acquired mitral stenosis (MS). Congenital (at birth) atrial septal defect refers to a hole being in the septum or wall that separates the two atria; this condition is usually seen in fetuses and infants. Mitral stenosis refers to mitral valve leaflets (or valve flaps) sticking to each other making the opening for blood to pass from the atrium to the ventricles very small. With the valve being so small, blood has difficulty passing through the left atrium into the left ventricle. There are several types of septal defects that may occur with Lutembacher's syndrome: ASD Ostium Secundum or ASD (Primium); Ostium Secundum is the most prevalent.Lutembacher is caused indirectly as the result of heart damage or disorders and not something that is necessarily infectious. Lutembacher's syndrome is caused by either birth defects where the heart fails to close all holes in the walls between the atria or from an episode of rheumatic fever where damage is done to the heart valves such as the mitral valve and resultant in an opening of heart wall between atria. With Lutembacher's syndrome, a fetus or infant is usually seen to have a hole in their heart wall (interatrial) separating their right and left atria. Normally during fetal development, blood bypasses the lungs and is oxygenated from the placenta. Blood passes from the umbilical cord and flows into the left atrium through an opening called the foramen ovale; the formaen ovale is a hole between the two atria. Once a baby is born and the lungs begin to fill with air and the blood flow of the heart changes, a tissue flap (somewhat like a trap door) called the septum primium closes the foramen ovale or hole between the two atria and becomes part of the atrial wall. The failure of the hole between the two atria to close after birth leads to a disorder called ASD primium. The most common problems with an opening found in the heart with Lutembacher's syndrome is Ostium Secundum. Ostium Secundum is a hole that is found within the flap of tissue (septum primium) that will eventually close the hole between the two atria after birth. With either type of ASD, ASD will usually cause the blood flow from the right atrium to skip going to the right ventricle and instead flow to the left atrium. If mitral stenosis (the hardening of flap of tissue known as a valve which opens and closes between the left atrium and ventricle to control blood flow) is also present, blood will flow into the right atrium through the hole between the atria wall instead of flowing into the left ventricle and systemic circulation. Eventually this leads to other problems such as the right ventricle failing and a reduced blood flow to the left ventricle.In addition to the ASD, acquired MS can be present either from an episode of rheumatic fever (the mother has or had rheumatic fever during the pregnancy) or the child being born with the disorder (congenital MS). With the combination of both ASD and MS, the heart can be under severe strain as it tries to move blood throughout the heart and lungs. To correct Lutembacher's syndrome, surgery is often done. There are several types of surgeries depending on the cause of Lutembacher's syndrome(ASD Primium or ASD Ostium Secundum with Mitral Stenosis): Suturing (stitching) or placing a patch of tissue (similar to skin grafting) over the hole to completely close the opening Reconstructing of the mitral and tricuspid valve while patching any holes in the heart Device closure of ASD (e.g. Amplatzer umbrella or CardioSEAL to seal the hole Percutaneous transcatheter therapy Transcatheter therapy of balloon valvuloplasty to correct MS↑ ↑ 2.0 2.1 2.2 2.3 2.4 ↑ 3.0 3.1 3.2 3.3 3.4 ↑ ↑ ↑ 6.0 6.1 6.2 6.3 ↑