Exercise EKG
... referred to as ectopic foci. These PAC’s and PVC’s alter the normal cardiac cycle and therefore result in an abnormal electrical rhythm. An abnormal heart rhythm is referred to as an arrhythmia. The normal electrical rhythm of the heart is referred to as Normal sinus rhythm. In addition to the myoca ...
... referred to as ectopic foci. These PAC’s and PVC’s alter the normal cardiac cycle and therefore result in an abnormal electrical rhythm. An abnormal heart rhythm is referred to as an arrhythmia. The normal electrical rhythm of the heart is referred to as Normal sinus rhythm. In addition to the myoca ...
ECG Interpretation
... Sometimes fine irregular movements of the baseline are seen as a result of the atrial fibrillation waves – referred to as ‘f’ waves, however these are frequently indistinguishable from baseline artefact (e.g. muscle tremor) in small animals. Clinical findings The heart rhythm sounds chaotic and the ...
... Sometimes fine irregular movements of the baseline are seen as a result of the atrial fibrillation waves – referred to as ‘f’ waves, however these are frequently indistinguishable from baseline artefact (e.g. muscle tremor) in small animals. Clinical findings The heart rhythm sounds chaotic and the ...
Atrial Fibrillation Associated with Heart Failure, Stroke and
... AF and HF have been investigated in several trials and clinical studies, often with conflicting results. Mamas et al. described the impact of AF on mortality in patients with congestive HF, metaanalyzing data from randomized trials and observational studies. Among the 30,248 patients with congestive ...
... AF and HF have been investigated in several trials and clinical studies, often with conflicting results. Mamas et al. described the impact of AF on mortality in patients with congestive HF, metaanalyzing data from randomized trials and observational studies. Among the 30,248 patients with congestive ...
as PDF
... minimal pericardial effusion. We decided to abstain from removing the lead, which would have been to some extent invasive in this elderly patient. Treatment by anti-inflammatory drug was installed and was sufficient for pain relief. ...
... minimal pericardial effusion. We decided to abstain from removing the lead, which would have been to some extent invasive in this elderly patient. Treatment by anti-inflammatory drug was installed and was sufficient for pain relief. ...
Heart failure in patients with sick sinus syndrome
... and DDDR pacing in SSS found no difference in mortality between the two groups.1 The AAIR pacing preserves a normal contraction pattern similar to the one seen during sinus rhythm, whereas DDDR pacing may lead to abnormal contraction patterns in the ventricles.2 In some patients, the abnormal contra ...
... and DDDR pacing in SSS found no difference in mortality between the two groups.1 The AAIR pacing preserves a normal contraction pattern similar to the one seen during sinus rhythm, whereas DDDR pacing may lead to abnormal contraction patterns in the ventricles.2 In some patients, the abnormal contra ...
Percentage of Left Ventricular
... and the aortic valve area in cm2 and cm2/m2 was - 0.79 and - 0.80, respectively (fig. 2). With five exceptions (cases 5, 6, 9, 10, and 47), patients who had aortic valve areas of 1.0 cm2 or less had greater than 30% left ventricular stroke work loss, and with two exceptions (cases 9 and 47) patients ...
... and the aortic valve area in cm2 and cm2/m2 was - 0.79 and - 0.80, respectively (fig. 2). With five exceptions (cases 5, 6, 9, 10, and 47), patients who had aortic valve areas of 1.0 cm2 or less had greater than 30% left ventricular stroke work loss, and with two exceptions (cases 9 and 47) patients ...
Clinical Examination: ECG library
... 6 Q waves are normally present in lead aVR and often in lead V1. Small q waves (less than 1/3 the height of the following R wave) are normal in the inferior leads. Small q waves may also be present in the lateral leads. Otherwise Q waves suggest previous myocardial infarction. 7 Deviation of the ST ...
... 6 Q waves are normally present in lead aVR and often in lead V1. Small q waves (less than 1/3 the height of the following R wave) are normal in the inferior leads. Small q waves may also be present in the lateral leads. Otherwise Q waves suggest previous myocardial infarction. 7 Deviation of the ST ...
Perventricular device closure of congenital muscular ventricular
... compromise, cardiac perforation, tamponade and death. Perventricular closure of such defects, introduced by Amin and coworkers in the late 1990s, has become an attractive treatment modality for these small and high-risk patients. Experience worldwide has shown that the procedure is feasible, reprodu ...
... compromise, cardiac perforation, tamponade and death. Perventricular closure of such defects, introduced by Amin and coworkers in the late 1990s, has become an attractive treatment modality for these small and high-risk patients. Experience worldwide has shown that the procedure is feasible, reprodu ...
Excessive vasoconstriction in rheumatic mitral stenosis with
... significantatrial shunts (r1.5:l) and 4) =I+ mitral regurgitation before valvuloplasty and <2t mitral regurgitation after valvuloplasty. Mitral regurgitation in our laboratory is graded as l+ if the left atrial silhouette is never fully visualized with regurgitant contrast medium and 2-i-for faint v ...
... significantatrial shunts (r1.5:l) and 4) =I+ mitral regurgitation before valvuloplasty and <2t mitral regurgitation after valvuloplasty. Mitral regurgitation in our laboratory is graded as l+ if the left atrial silhouette is never fully visualized with regurgitant contrast medium and 2-i-for faint v ...
المحاضرة 02 كيفية رسم وقراءة التغيرات الكهربية للقلب 1
... negative. In contrast, however, this signal is moving towards lead V6 producing a strong positive deflection. The flow of depolarisation around the ventricles is recorded as the QRS complex and the morphology of the QRS complex differs predictably in the ECG leads depending on their position relativ ...
... negative. In contrast, however, this signal is moving towards lead V6 producing a strong positive deflection. The flow of depolarisation around the ventricles is recorded as the QRS complex and the morphology of the QRS complex differs predictably in the ECG leads depending on their position relativ ...
Relation between Doppler transmitral flow and wall motion
... velocities have been proposed as a useful non-invasive tool to examine left ventricular diastolic function. With the present study we sought to evaluate whether changes in Doppler transmitral flow profile are related to the severity and extent of dipyridamole-induced wall motion abnormalities in pat ...
... velocities have been proposed as a useful non-invasive tool to examine left ventricular diastolic function. With the present study we sought to evaluate whether changes in Doppler transmitral flow profile are related to the severity and extent of dipyridamole-induced wall motion abnormalities in pat ...
Temporary Pacemakers
... • Set pacer rate 10 ppm faster than patient’s HR • Decrease mA until capture is lost • Increase output until capture is regained (threshold ...
... • Set pacer rate 10 ppm faster than patient’s HR • Decrease mA until capture is lost • Increase output until capture is regained (threshold ...
Full Article - College of Intensive Care Medicine
... pressure in one ventricle augments the pressure in diastole and systole of the other ventricle. This effect is actually greater per unit increase in pressure on the right side. However, because the generated pressures are so much larger in the left heart, the overall effect of the force generated by ...
... pressure in one ventricle augments the pressure in diastole and systole of the other ventricle. This effect is actually greater per unit increase in pressure on the right side. However, because the generated pressures are so much larger in the left heart, the overall effect of the force generated by ...
The Contribution of Doppler Echocardiography to the Assessment of
... ed earlier in the apical segment.33 Moreover, it has been found that in patients with chest pain without segmental LV wall motion abnormalities, an increase of the interval from the R peak of the QRS complex to the S wave peak of the TDI signal is related to ischemia.34 Successful differential diagn ...
... ed earlier in the apical segment.33 Moreover, it has been found that in patients with chest pain without segmental LV wall motion abnormalities, an increase of the interval from the R peak of the QRS complex to the S wave peak of the TDI signal is related to ischemia.34 Successful differential diagn ...
New Approaches to Evaluate Mechanical Dyssynchrony г Potential
... Mechanical dyssynchrony can be quantified by the Fourier decomposition of myocardial strain. 33-35 The Fourier analysis of each component of the strain is determined over time and space. The zero-order component S0 of the Fourier decomposition is constant and represents perfectly synchronous contrac ...
... Mechanical dyssynchrony can be quantified by the Fourier decomposition of myocardial strain. 33-35 The Fourier analysis of each component of the strain is determined over time and space. The zero-order component S0 of the Fourier decomposition is constant and represents perfectly synchronous contrac ...
Role of Left Ventricular Diastolic Dysfunction in Predicting
... Although direct-current cardioversion (DCCV) is a well-established and highly effective method to convert AF to sinus rhythm, it offers little else beyond immediate rate control because it does not address the underlying cause of AF. Preservation of sinus rhythm after successful cardioversion still ...
... Although direct-current cardioversion (DCCV) is a well-established and highly effective method to convert AF to sinus rhythm, it offers little else beyond immediate rate control because it does not address the underlying cause of AF. Preservation of sinus rhythm after successful cardioversion still ...
Effect of disopyramide on potassium currents in rabbit ventricular
... current (Ik1). APD can also be lengthened by increasing inward currents such as the L-type calcium current (ICa) or INa (Buggisch et al. 1985). Disopyramide however influences both ICa and INa oppositely; i.e. by depressing these currents (Yatani and Akaike 1985; Kodama et al. 1986; Coraboeuf et al. ...
... current (Ik1). APD can also be lengthened by increasing inward currents such as the L-type calcium current (ICa) or INa (Buggisch et al. 1985). Disopyramide however influences both ICa and INa oppositely; i.e. by depressing these currents (Yatani and Akaike 1985; Kodama et al. 1986; Coraboeuf et al. ...
Does the successful ventricular defibrillation decide by energy or
... be enforced to depolarize and enter refractory period at the same time when electric field of the shock interacts with myocardium cells. In this case, all the propagation of the depolarization waves will be terminated and the ventricular fibrillation will stop also. For a long time, the electric sho ...
... be enforced to depolarize and enter refractory period at the same time when electric field of the shock interacts with myocardium cells. In this case, all the propagation of the depolarization waves will be terminated and the ventricular fibrillation will stop also. For a long time, the electric sho ...
- Wiley Online Library
... Detection of the increased electromotiveforce is essential in the diagnosis of left ventricular hypertrophy. However, the amplitude of electrical potential recorded from body surface is influenced by many factors, such as distance from the current source to the electrode and electrical conductivitie ...
... Detection of the increased electromotiveforce is essential in the diagnosis of left ventricular hypertrophy. However, the amplitude of electrical potential recorded from body surface is influenced by many factors, such as distance from the current source to the electrode and electrical conductivitie ...
Deaths in long-term paced patients
... Johansson has shown that the mortality in complete block is concentrated to a period shortly after its onset. It is necessary, therefore, to consider whether there is a bias between the unpaced group and the paced group resulting from the inclusion of this danger period more frequently in one group ...
... Johansson has shown that the mortality in complete block is concentrated to a period shortly after its onset. It is necessary, therefore, to consider whether there is a bias between the unpaced group and the paced group resulting from the inclusion of this danger period more frequently in one group ...
Pressure overload alters stress-strain properties of the developing
... response to mechanical strain in vitro (31). A fundamental question is whether a negative-feedback control mechanism exists, so that overall tissue response reduces the difference between a mechanical quantity sensed by the cell and a preset limit. The passive mechanical structure of the heart, cons ...
... response to mechanical strain in vitro (31). A fundamental question is whether a negative-feedback control mechanism exists, so that overall tissue response reduces the difference between a mechanical quantity sensed by the cell and a preset limit. The passive mechanical structure of the heart, cons ...
Imaging cardiac activation sequence during ventricular tachycardia
... electrodes were uniformly placed to cover both the anterior-lateral chest up to the mid-axillary line and the posterior chest. The heart was exposed via median sternotomy, and up to 47 transmural plunge-needle electrodes were inserted in the LV and right ventricle (RV). Each LV plunge-needle electro ...
... electrodes were uniformly placed to cover both the anterior-lateral chest up to the mid-axillary line and the posterior chest. The heart was exposed via median sternotomy, and up to 47 transmural plunge-needle electrodes were inserted in the LV and right ventricle (RV). Each LV plunge-needle electro ...
Optimal pacing strategies for coming off CPB
... that the atrial pacing stimulus will not be inhibited even though there is an intrinsic atrial rhythm. This may lead to competition if the atrium is beating at a faster rate, and can precipitate atrial arrhythmias. For this reason, DDI or DDD are preferable to DVI in patients with atrial rates high ...
... that the atrial pacing stimulus will not be inhibited even though there is an intrinsic atrial rhythm. This may lead to competition if the atrium is beating at a faster rate, and can precipitate atrial arrhythmias. For this reason, DDI or DDD are preferable to DVI in patients with atrial rates high ...
rv_systolic_dysfunction
... EF.Dilated cardiomyopathy is the most common form of cardiomyopathy in children. The most common cause of dilated cardiomyopathy is idiopathic (>60%), followed by familial cardiomyopathy, active myocarditis, and other causes.[1].The RV is usually forgotten during echocardiographic assessment of pati ...
... EF.Dilated cardiomyopathy is the most common form of cardiomyopathy in children. The most common cause of dilated cardiomyopathy is idiopathic (>60%), followed by familial cardiomyopathy, active myocarditis, and other causes.[1].The RV is usually forgotten during echocardiographic assessment of pati ...
Right ventricular dysfunction in patients with idiopathic dilated
... (17.6%) died in our cohort: 10 in group 1 (30%) and 14 in group 2 (14%). The cause of death was cardiac-related for 20 patients (eight in group 1; 12 in group 2); the four other deaths were the result of cancer or septic shock. Fortynine patients (36%) presented MACE, consisting of 20 cardiac deaths ...
... (17.6%) died in our cohort: 10 in group 1 (30%) and 14 in group 2 (14%). The cause of death was cardiac-related for 20 patients (eight in group 1; 12 in group 2); the four other deaths were the result of cancer or septic shock. Fortynine patients (36%) presented MACE, consisting of 20 cardiac deaths ...
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.