cardiac rhythm and atrial transport function after surgical ablation of
... AF occurs in up to 45% of patients with heart failure6. Its prevalence depends on the severity of heart failure, and rises approximately from 5% in the NYHA I functional class up to 50% in NYHA IV class7. Up to 50% of patients undergoing mitral valve surgery are diagnosed with AF prior to the surger ...
... AF occurs in up to 45% of patients with heart failure6. Its prevalence depends on the severity of heart failure, and rises approximately from 5% in the NYHA I functional class up to 50% in NYHA IV class7. Up to 50% of patients undergoing mitral valve surgery are diagnosed with AF prior to the surger ...
Single and Dual Chamber Pacemaker Timing Module 6 1
... accompanying leads should not receive diathermy treatment. The interaction between the implant and diathermy can cause tissue damage, fibrillation, or damage to the device components, which could result in serious injury, loss of therapy, or the need to reprogram or replace the device. • For the Sel ...
... accompanying leads should not receive diathermy treatment. The interaction between the implant and diathermy can cause tissue damage, fibrillation, or damage to the device components, which could result in serious injury, loss of therapy, or the need to reprogram or replace the device. • For the Sel ...
The Clinical Value of Frequency Analysis ofthe First
... A sensitive technic for frequency analysis of the first heart sound (Sl) during isovolumic contraction time (ICT) was developed. Recorded heart sounds were filtered with a dynamic analyzer. Amplitudes of frequencies between 30 and 70 cps were plotted as a percentage of peak total energy of S, agains ...
... A sensitive technic for frequency analysis of the first heart sound (Sl) during isovolumic contraction time (ICT) was developed. Recorded heart sounds were filtered with a dynamic analyzer. Amplitudes of frequencies between 30 and 70 cps were plotted as a percentage of peak total energy of S, agains ...
Cardiac screening examination of the fetus
... one-third the area of the chest. Some views may reveal a small hypoechogenic rim around the fetal heart that can be mistaken for a pericardial effusion. An isolated finding of this type usually represents a normal variation34,35 . Cardiac rate and regular rhythm should be confirmed. The normal rate ...
... one-third the area of the chest. Some views may reveal a small hypoechogenic rim around the fetal heart that can be mistaken for a pericardial effusion. An isolated finding of this type usually represents a normal variation34,35 . Cardiac rate and regular rhythm should be confirmed. The normal rate ...
Effect of Heart Rate Increase on Dorsal Aortic Flow in the
... The early chick embryo did not respond like the late gestation fetal lamb to a spontaneous increase in heart rate. Rather, the chick embryo behaved more like the fetal lamb paced from the left atrium (8). We found that as heart rate increased above intrinsic, there was a marked compromise in cardiac ...
... The early chick embryo did not respond like the late gestation fetal lamb to a spontaneous increase in heart rate. Rather, the chick embryo behaved more like the fetal lamb paced from the left atrium (8). We found that as heart rate increased above intrinsic, there was a marked compromise in cardiac ...
Contemporary management of acute right ventricular failure: a
... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
Contemporary management of acute right ventricular failure: a
... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
... Right ventricular mechanics and function are altered in the setting of either pressure overload or volume overload (Figure 1, Table 1). Failure may also result from a primary reduction of myocardial contractility owing to ischaemia, cardiomyopathy, or arrhythmia. The right ventricle is not built to ...
Left Ventricular Pressure-Volume and Frank-Starling
... l/k=449.8+283.8 versus 35.3+±4.3). This resulted in larger absolute and relative changes in end-diastolic volume over an equivalent range of filling pressures. Conclusions. Endurance athletes have greater ventricular diastolic chamber compliance and distensibility than nonathletes and thus operate o ...
... l/k=449.8+283.8 versus 35.3+±4.3). This resulted in larger absolute and relative changes in end-diastolic volume over an equivalent range of filling pressures. Conclusions. Endurance athletes have greater ventricular diastolic chamber compliance and distensibility than nonathletes and thus operate o ...
Right ventricular reserve in a piglet model of chronic pulmonary hypertension
... RV inflow and assess end-systolic pressure–volume relationships. End-systolic elastance of the right ventricle (Ees) was defined by the slope of the end-systolic pressure–volume relationship. Pulmonary arterial elastance (Ea) was calculated as the ratio of RV end-systolic pressure to stroke volume. ...
... RV inflow and assess end-systolic pressure–volume relationships. End-systolic elastance of the right ventricle (Ees) was defined by the slope of the end-systolic pressure–volume relationship. Pulmonary arterial elastance (Ea) was calculated as the ratio of RV end-systolic pressure to stroke volume. ...
Etiology of Sudden Death in Sports
... BACKGROUND Accurate knowledge of causes of sudden cardiac death (SCD) in athletes and its precipitating factors is necessary to establish preventative strategies. OBJECTIVES This study investigated causes of SCD and their association with intensive physical activity in a large cohort of athletes. ME ...
... BACKGROUND Accurate knowledge of causes of sudden cardiac death (SCD) in athletes and its precipitating factors is necessary to establish preventative strategies. OBJECTIVES This study investigated causes of SCD and their association with intensive physical activity in a large cohort of athletes. ME ...
Arterial switch operation for transposition of great arteries: late
... myocardial blood flow (MBF) at rest and, consequently, a significant impairment of coronary flow reserve (CFR) when compared to healthy controls. Visual analysis of the PET images revealed adenosine induced reversible perfusion defects in 24% of patients after ASO 25. These abnormalities were confir ...
... myocardial blood flow (MBF) at rest and, consequently, a significant impairment of coronary flow reserve (CFR) when compared to healthy controls. Visual analysis of the PET images revealed adenosine induced reversible perfusion defects in 24% of patients after ASO 25. These abnormalities were confir ...
![Coronary Sinus Anatomy[PPT]](http://s1.studyres.com/store/data/000439482_1-8ac51d75d319fa82f83c67448f24ef92-300x300.png)
Coronary Sinus Anatomy[PPT]
... portion of the CS up to the orifice of the vein of Marshall. In this patient multiple posterior and posterolateral veins are also seen draining into the CS. ...
... portion of the CS up to the orifice of the vein of Marshall. In this patient multiple posterior and posterolateral veins are also seen draining into the CS. ...
Arrhythmia in Pediatric
... warfarin is recommended before cardioversion to prevent embolization. Recent report suggest that amiodarone may be more elective than digoxin in treating a trial flutter. When electric cardio version required digitalis should be discontinued for at 48 hr. Start anticoagulation with warfarin is recom ...
... warfarin is recommended before cardioversion to prevent embolization. Recent report suggest that amiodarone may be more elective than digoxin in treating a trial flutter. When electric cardio version required digitalis should be discontinued for at 48 hr. Start anticoagulation with warfarin is recom ...
Physiological changes in pregnancy
... compared with singleton pregnancies. A paravertebral collateral circulation can develop that allows blood to bypass the obstructed inferior vena cava. A number of mechanisms are postulated for the hypervolemia of pregnancy. Estrogen increases renin levels and causes sodium retention and an increase ...
... compared with singleton pregnancies. A paravertebral collateral circulation can develop that allows blood to bypass the obstructed inferior vena cava. A number of mechanisms are postulated for the hypervolemia of pregnancy. Estrogen increases renin levels and causes sodium retention and an increase ...
EGANSChapter_09
... Ventricular contraction forces closed valves, preventing backflow of blood into atria. The lower ends of the valves anchor to ventricular papillary muscles by chordae tendineae. • Papillary contraction during systole pulls on chordae, preventing valve reversing into atria. ...
... Ventricular contraction forces closed valves, preventing backflow of blood into atria. The lower ends of the valves anchor to ventricular papillary muscles by chordae tendineae. • Papillary contraction during systole pulls on chordae, preventing valve reversing into atria. ...
Balloon Pulmonary Valvuloplasty in Adults with Congenital Valvular
... is trivial; 25 to 49 mmHg, mild; 50 to 79 mmHg, moderate; ³ 80 mmHg, severe.2 Natural history reveals that severe congenital valvular PS has relatively poor long-term prognosis due to right heart failure, especially there is right-to-left shunt. It is recommended that the indications for interventio ...
... is trivial; 25 to 49 mmHg, mild; 50 to 79 mmHg, moderate; ³ 80 mmHg, severe.2 Natural history reveals that severe congenital valvular PS has relatively poor long-term prognosis due to right heart failure, especially there is right-to-left shunt. It is recommended that the indications for interventio ...
Chapter 9 The Cardiovascular System
... Ventricular contraction forces closed valves, preventing backflow of blood into atria. The lower ends of the valves anchor to ventricular papillary muscles by chordae tendineae. • Papillary contraction during systole pulls on chordae, preventing valve reversing into atria. ...
... Ventricular contraction forces closed valves, preventing backflow of blood into atria. The lower ends of the valves anchor to ventricular papillary muscles by chordae tendineae. • Papillary contraction during systole pulls on chordae, preventing valve reversing into atria. ...
Mean pulmonary pressure estimation by
... close patient monitoring might seem justified because the possible increased risk of pulmonary hypertension development (due that E1 an E2 are more sensitive but less specific than E3), or if high clinical suspicion exists, proceed to perform a right heart catheterization in order to confirm the dia ...
... close patient monitoring might seem justified because the possible increased risk of pulmonary hypertension development (due that E1 an E2 are more sensitive but less specific than E3), or if high clinical suspicion exists, proceed to perform a right heart catheterization in order to confirm the dia ...
Fast Facts for the Cardiac Surgery Nurse: Caring
... 1. Epidemiology of Coronary Artery Disease, Valve Disease, and Need for Heart Surgery ...
... 1. Epidemiology of Coronary Artery Disease, Valve Disease, and Need for Heart Surgery ...
SVT
... • P waves take on a “sawtooth” appearance and are called F waves or flutter waves – Atrial rhythm and ventricular response are usually regular – Atrial rate 250-350 beats/min. Ventricular rate varies depending on the number of impulses the AV node is blocking – No P waves or PR interval – QRS normal ...
... • P waves take on a “sawtooth” appearance and are called F waves or flutter waves – Atrial rhythm and ventricular response are usually regular – Atrial rate 250-350 beats/min. Ventricular rate varies depending on the number of impulses the AV node is blocking – No P waves or PR interval – QRS normal ...
Mean pulmonary pressure estimation by echocardiography: three
... close patient monitoring might seem justified because the possible increased risk of pulmonary hypertension development (due that E1 an E2 are more sensitive but less specific than E3), or if high clinical suspicion exists, proceed to perform a right heart catheterization in order to confirm the dia ...
... close patient monitoring might seem justified because the possible increased risk of pulmonary hypertension development (due that E1 an E2 are more sensitive but less specific than E3), or if high clinical suspicion exists, proceed to perform a right heart catheterization in order to confirm the dia ...
Feasibility and efficacy of bypassing the right ventricle and
... Full list of author information is available at the end of the article ...
... Full list of author information is available at the end of the article ...
Cardiopulmonary Exercise Testing Variables
... of left ventricular filling pressure, appears to be particularly valuable. Given the established value of echocardiography with TDI in those with HF-NEF, determination of its relationship to CPX, a well-established clinical assessment technique in its own right, is warranted. Initial research indica ...
... of left ventricular filling pressure, appears to be particularly valuable. Given the established value of echocardiography with TDI in those with HF-NEF, determination of its relationship to CPX, a well-established clinical assessment technique in its own right, is warranted. Initial research indica ...
Ventriculoarterial Coupling in Normal and Failing Heart in Humans
... oxygen consumption per beat (MVo?). Several investigators looked into this efficiency of cardiac pump.1'9-11 They came to a similar theoretical conclusion that the mechanical efficiency from a given end-diastolic volume becomes maximal when arterial impedance is nearly one half the cardiac output im ...
... oxygen consumption per beat (MVo?). Several investigators looked into this efficiency of cardiac pump.1'9-11 They came to a similar theoretical conclusion that the mechanical efficiency from a given end-diastolic volume becomes maximal when arterial impedance is nearly one half the cardiac output im ...
Off-design Considerations of the 50cc Penn State Ventricular Assist
... Heart rate comparison Phase averaged maps at 12.5% after the onset of diastole, just before the peak inflow, are shown in Fig. 3. The peak inlet jet velocity becomes progressively faster as the heart rate increases: 60 bpm (Fig. 3a) has maximum velocities of approximately 1.8 m/s, 75 bpm (Fig. 3b) h ...
... Heart rate comparison Phase averaged maps at 12.5% after the onset of diastole, just before the peak inflow, are shown in Fig. 3. The peak inlet jet velocity becomes progressively faster as the heart rate increases: 60 bpm (Fig. 3a) has maximum velocities of approximately 1.8 m/s, 75 bpm (Fig. 3b) h ...
Mitral insufficiency
Mitral insufficiency (MI), mitral regurgitation or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.