Prognostic Value of Global Myocardial Performance Indices in Acute
... mitral inflow and LV outflow velocity time intervals with good reproducibility, and is independent from LV geometry and heart rate.2 It correlates well with invasive measures of systolic and diastolic LV function,3 and has been reported to correlate better with patient outcome than conventional ech ...
... mitral inflow and LV outflow velocity time intervals with good reproducibility, and is independent from LV geometry and heart rate.2 It correlates well with invasive measures of systolic and diastolic LV function,3 and has been reported to correlate better with patient outcome than conventional ech ...
Catheter Ablation as Treatment for Atrial Fibrillation
... generally involve more extensive ablation than do initial procedures. Repeat procedures following an initial radiofrequency ablation are commonly performed if atrial fibrillation recurs or if atrial flutter develops post-procedure. A number of clinical and demographic factors have been associated wi ...
... generally involve more extensive ablation than do initial procedures. Repeat procedures following an initial radiofrequency ablation are commonly performed if atrial fibrillation recurs or if atrial flutter develops post-procedure. A number of clinical and demographic factors have been associated wi ...
“W-shaped” volume curve with gated myocardial perfusion single
... Araujo et al. reported that soft tissue attenuation artifacts are most evident in low count density studies and obese patients with dense soft tissue, such as abdominal protuberance and prominent breasts. Therefore these attenuation artifacts tend no appear in the right coronary artery territory in ...
... Araujo et al. reported that soft tissue attenuation artifacts are most evident in low count density studies and obese patients with dense soft tissue, such as abdominal protuberance and prominent breasts. Therefore these attenuation artifacts tend no appear in the right coronary artery territory in ...
Heart Physiology
... Ion Channel Involvement and Electrical Event Electrical Event resulting in Mechanical Event ECG (measurement of electrical event) Events of the Cardiac Cycle Regulation of Cardiac Cycle Copyright 2017 Dr. Mary Cat Flath ...
... Ion Channel Involvement and Electrical Event Electrical Event resulting in Mechanical Event ECG (measurement of electrical event) Events of the Cardiac Cycle Regulation of Cardiac Cycle Copyright 2017 Dr. Mary Cat Flath ...
Dobutamine stress echo-induced apical ballooning (Takotsubo
... vulnerable to sympathetically mediated stunning, and postmenopausal alteration of endothelial function in response to decreased oestrogen levels has been associated advocated as a possible explanation.11 A recent paper postulated that the condition arises due to the hyperdynamic basal segments creat ...
... vulnerable to sympathetically mediated stunning, and postmenopausal alteration of endothelial function in response to decreased oestrogen levels has been associated advocated as a possible explanation.11 A recent paper postulated that the condition arises due to the hyperdynamic basal segments creat ...
Non-Classical Indications for Cardiac Resynchronization Therapy
... the major CRT trials and only a few studies have examined the clinical outcome in patients with a preexisting right ventricular pacemaker or intra-cardiac defibrillator (ICD) undergoing upgrade to CRT. The beneficial results from most of these studies were similar to or even greater than those demon ...
... the major CRT trials and only a few studies have examined the clinical outcome in patients with a preexisting right ventricular pacemaker or intra-cardiac defibrillator (ICD) undergoing upgrade to CRT. The beneficial results from most of these studies were similar to or even greater than those demon ...
130 Right heart physiology n
... Congenital heart disease The intricate and complicated physiology of congenital heart disease is outside the scope of this tutorial. However an atrio-ventricular septal defect alone or as part of a more complicated syndrome results in left to right shunting of blood and consequent volume overload. T ...
... Congenital heart disease The intricate and complicated physiology of congenital heart disease is outside the scope of this tutorial. However an atrio-ventricular septal defect alone or as part of a more complicated syndrome results in left to right shunting of blood and consequent volume overload. T ...
Frequency of spontaneous and inducible atrioventricular nodal
... This was observed in one patient (#8) both spontaneously (Fig. 2) and at electrophysiologic study during isoproterenol infusion (Fig. 4). One may suspect that this patient had outflow tract VT due to c-AMP-mediated triggered activity that could be induced by rapid heart rhythm resulting from AVNRT i ...
... This was observed in one patient (#8) both spontaneously (Fig. 2) and at electrophysiologic study during isoproterenol infusion (Fig. 4). One may suspect that this patient had outflow tract VT due to c-AMP-mediated triggered activity that could be induced by rapid heart rhythm resulting from AVNRT i ...
Transcatheter closure of atrial septal defect preserves - Heart
... Although delayed right ventricular contraction has been detected with radionuclide studies (in the absence of conduction defects),21 echocardiographic assessment has shown right ventricular systolic function to be normal or exaggerated.3 22 Abnormal septal motion occurs in the majority (up to 86%) o ...
... Although delayed right ventricular contraction has been detected with radionuclide studies (in the absence of conduction defects),21 echocardiographic assessment has shown right ventricular systolic function to be normal or exaggerated.3 22 Abnormal septal motion occurs in the majority (up to 86%) o ...
ECG Made EASIER
... An ECG is the primary monitor for diagnosis of cardiac conduction abnormalities and rhythm disturbances. An ECG is a tracing created with electrodes on the skin that amplify cardiac electrical potentials. The normal ECG tracing is a complex composed of three waveforms: P wave (atrial depolarizatio ...
... An ECG is the primary monitor for diagnosis of cardiac conduction abnormalities and rhythm disturbances. An ECG is a tracing created with electrodes on the skin that amplify cardiac electrical potentials. The normal ECG tracing is a complex composed of three waveforms: P wave (atrial depolarizatio ...
ECHOCARDIOGRAPHY ASSESSMENT OF SYSTOLIC FUNCTION
... Fractional shortening and EF calculation from LV linear measurements by earlyused Teichholz or Quinones formulas, both based on geometrical assumptions, are no longer recommended; however, using 2D echocardiography with modified Simpson’s rule with biplane planimetry of LV is currently recommended [ ...
... Fractional shortening and EF calculation from LV linear measurements by earlyused Teichholz or Quinones formulas, both based on geometrical assumptions, are no longer recommended; however, using 2D echocardiography with modified Simpson’s rule with biplane planimetry of LV is currently recommended [ ...
Noninvasive epicardial and endocardial mapping of premature
... A variety of non-invasive imaging systems to display electrical cardiac activity have been used as diagnostic tools in clinical cardiac electrophysiology.5 – 8 The method of non-invasive electrocardiographic imaging (ECGI) has demonstrated significant clinical relevance, allowing non-invasive recons ...
... A variety of non-invasive imaging systems to display electrical cardiac activity have been used as diagnostic tools in clinical cardiac electrophysiology.5 – 8 The method of non-invasive electrocardiographic imaging (ECGI) has demonstrated significant clinical relevance, allowing non-invasive recons ...
Open Access
... York Heart Association functional class deteriorated from class I at initial visits to class III at recent visits. The 12-lead ECG taken at the age of 19 years (Figure 1) showed a regular sinus rhythm with prominent right (amplitude of the P initial force V2 lead = 0.5 mV) and left atrial (Morris in ...
... York Heart Association functional class deteriorated from class I at initial visits to class III at recent visits. The 12-lead ECG taken at the age of 19 years (Figure 1) showed a regular sinus rhythm with prominent right (amplitude of the P initial force V2 lead = 0.5 mV) and left atrial (Morris in ...
The decrease of cardiac chamber volumes and output during
... doi:10.1152/ajpheart.00309.2013.—Positive-pressure ventilation (PPV) is widely used for treatment of acute cardiorespiratory failure, occasionally at the expense of compromised cardiac function and arterial blood pressure. The explanation why has largely rested on interpretation of intracardiac pres ...
... doi:10.1152/ajpheart.00309.2013.—Positive-pressure ventilation (PPV) is widely used for treatment of acute cardiorespiratory failure, occasionally at the expense of compromised cardiac function and arterial blood pressure. The explanation why has largely rested on interpretation of intracardiac pres ...
ventricular weight in cardiac hypertrophy - Heart
... for congenital and other lesions of the great vessels, the aorta and pulmonary artery were divided about 1 cm. above the semilunar valves, which were examined. The atria were then opened posteriorly, and the blood clot washed out from the atrial and ventricular cavities. After examination of the mit ...
... for congenital and other lesions of the great vessels, the aorta and pulmonary artery were divided about 1 cm. above the semilunar valves, which were examined. The atria were then opened posteriorly, and the blood clot washed out from the atrial and ventricular cavities. After examination of the mit ...
Cardiac Arrhythmias: Diagnosis and Management. The Tachycardias
... QRS complex that is not preceded by a P wave. It often bears a relatively fixed relationship to the preceding sinus complex. If fixed coupling does not exist but the intervals between the ventricular ectopic beats are regular, then the ectopic beat has an entry block and ventricular parasystole is s ...
... QRS complex that is not preceded by a P wave. It often bears a relatively fixed relationship to the preceding sinus complex. If fixed coupling does not exist but the intervals between the ventricular ectopic beats are regular, then the ectopic beat has an entry block and ventricular parasystole is s ...
Atrial Fibrillation - Ulster Medical Society
... Percutaneous catheter ablation is performed under conscious sedation or general anaesthetic using an approach performed via the right femoral vein. An atrial septal puncture is used to gain access to the left atrium and pulmonary veins (PV’s). The PV’s are electrically isolated from the left atrium ...
... Percutaneous catheter ablation is performed under conscious sedation or general anaesthetic using an approach performed via the right femoral vein. An atrial septal puncture is used to gain access to the left atrium and pulmonary veins (PV’s). The PV’s are electrically isolated from the left atrium ...
article in press - Bahman Arrhythmia Clinic
... appears to be the best imaging technique as it provides information about volumes, wall motion right ventricular abnormalities, but principally because it shows intramyocardial fat deposits seen as an intense signal (Fig. 3) compared with the normal myocardium [46]. MRI provides the advantage of dis ...
... appears to be the best imaging technique as it provides information about volumes, wall motion right ventricular abnormalities, but principally because it shows intramyocardial fat deposits seen as an intense signal (Fig. 3) compared with the normal myocardium [46]. MRI provides the advantage of dis ...
The Heart - TeacherWeb
... Some P waves are not conducted deflections are seen in acute through the AV node; hence more heart attack and electrical shock. P than QRS waves are seen. In this tracing, the ratio of P waves to QRS waves is mostly 2:1. Copyright © 2010 Pearson Education, Inc. ...
... Some P waves are not conducted deflections are seen in acute through the AV node; hence more heart attack and electrical shock. P than QRS waves are seen. In this tracing, the ratio of P waves to QRS waves is mostly 2:1. Copyright © 2010 Pearson Education, Inc. ...
X35129134
... using DSP techniques [7-9]. Normal and abnormal ECGs can be effectively studied in terms of Power spectrum Density [10]. These techniques of DSP can be considered as effective tools for identifying cardiac abnormalities. In this paper, attempts have been made to identify Intracardiac atria fibrillat ...
... using DSP techniques [7-9]. Normal and abnormal ECGs can be effectively studied in terms of Power spectrum Density [10]. These techniques of DSP can be considered as effective tools for identifying cardiac abnormalities. In this paper, attempts have been made to identify Intracardiac atria fibrillat ...
Experimental Study of the so Called Left Ventricular Isovolumic
... cavities. This myocardial band would be composed of the “basal loop” and the “apical loop.” The basal loop is predominantly horizontal and divides into left and right segments; the apical loop is predominantly vertical and consists of the descending segment and the ascending segment (Figure 1). Ejec ...
... cavities. This myocardial band would be composed of the “basal loop” and the “apical loop.” The basal loop is predominantly horizontal and divides into left and right segments; the apical loop is predominantly vertical and consists of the descending segment and the ascending segment (Figure 1). Ejec ...
Right and left ventricular ejection fraction in acute inferior wall
... extending over the apex of the left ventricle to the inferior wall. Occlusion of such a long left anterior descending artery may lead to an electrocardiographic pattern of both anterior and inferior wall myocardial infarction. The differentiation between occlusion of the right or circumflex coronary ...
... extending over the apex of the left ventricle to the inferior wall. Occlusion of such a long left anterior descending artery may lead to an electrocardiographic pattern of both anterior and inferior wall myocardial infarction. The differentiation between occlusion of the right or circumflex coronary ...
Bidirectional Ventricular Septal Defect Shunt: Quantification
... size of the defect and the degree of the pulmonary vascular resistance. Non-significant VSDs tend to have left to right shunts. Left-to-right gradient is maintained so long as the peak right ventricular systolic pressure is <70 mm Hg and the left-to-right gradient is 15-30 mm Hg. From that moment, a ...
... size of the defect and the degree of the pulmonary vascular resistance. Non-significant VSDs tend to have left to right shunts. Left-to-right gradient is maintained so long as the peak right ventricular systolic pressure is <70 mm Hg and the left-to-right gradient is 15-30 mm Hg. From that moment, a ...
Special Article Spontaneous Conversion to Sinus Rhythm of Recent
... our study which was less than 24 hr. In addition in our study patients with left ventricular hypertrophy, congestive heart failure, valvular heart disease and hyperthyroidism were excluded, and thus patient population in one study was homogeneous. In this homogenous group of patients, the data have ...
... our study which was less than 24 hr. In addition in our study patients with left ventricular hypertrophy, congestive heart failure, valvular heart disease and hyperthyroidism were excluded, and thus patient population in one study was homogeneous. In this homogenous group of patients, the data have ...
CPR: what are the current recommendations?
... during CPR is not beneficial.5 In those rare cases requiring treatment of calcium channel blocker toxicity, severe hyperkalaemia or a documented ionised hypocalcaemia, 10 per cent calcium gluconate can be given at 0.5-1.5ml/kg slowly IV. Remember – the serum total calcium is NOT an accurate reflecti ...
... during CPR is not beneficial.5 In those rare cases requiring treatment of calcium channel blocker toxicity, severe hyperkalaemia or a documented ionised hypocalcaemia, 10 per cent calcium gluconate can be given at 0.5-1.5ml/kg slowly IV. Remember – the serum total calcium is NOT an accurate reflecti ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.