Spectral characteristics of ventricular response to atrial fibrillation
... The tapes were played back with a Holter ECG scanner (DMC-4100, Nihon Koden) at a rate 240 times faster than real time and digitized to 12-bit data at a sampling frequency of 128 Hz. QRS complexes were detected and labeled automatically. The results of the automatic analysis were reviewed, and any e ...
... The tapes were played back with a Holter ECG scanner (DMC-4100, Nihon Koden) at a rate 240 times faster than real time and digitized to 12-bit data at a sampling frequency of 128 Hz. QRS complexes were detected and labeled automatically. The results of the automatic analysis were reviewed, and any e ...
THE ROLE OF AUTONOMIC AND MYOCARDIAL FACTORS I.N
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
Treatment of arrhythmogenic right ventricular
... Recommendations are based on available data derived from nonrandomized and observational studies and consensus within the conference panellists. When development of prognostic-therapeutic algorithms was controversial, management decisions were recommended to be individualized. Recommendation and lev ...
... Recommendations are based on available data derived from nonrandomized and observational studies and consensus within the conference panellists. When development of prognostic-therapeutic algorithms was controversial, management decisions were recommended to be individualized. Recommendation and lev ...
Relation between myocardial infarct location and stroke
... When the patients with nonanterior infarctionwere classified into those with inferior or posterolateral Q waves a with nap-Q wave infarction, the likelih 3.5% and 4.%, respectively. Figure 1 Meier life table event rate for patients with anterior and r myocardial infarction. As is evident, no signifi ...
... When the patients with nonanterior infarctionwere classified into those with inferior or posterolateral Q waves a with nap-Q wave infarction, the likelih 3.5% and 4.%, respectively. Figure 1 Meier life table event rate for patients with anterior and r myocardial infarction. As is evident, no signifi ...
Determinants of Conduction Slowing During Ventricular
... Mechanical load has been shown to alter cardiac electrophysiology. This feedback may contribute to arrhythmia in patients suffering from structural heart defects. Our group has recently shown that a slowing of conduction in the volume loaded rabbit left ventricle is due, in part, to alterations in p ...
... Mechanical load has been shown to alter cardiac electrophysiology. This feedback may contribute to arrhythmia in patients suffering from structural heart defects. Our group has recently shown that a slowing of conduction in the volume loaded rabbit left ventricle is due, in part, to alterations in p ...
Relationship of the Pulmonary Artery End
... a which could be identified only at the basal heart rate was identical to the LVEDP. In the five patients studied during atrial fibrillation, the LVEDP was found to be equal to the PAEDP in one case and lower than the PAEDP in four, in three of which PVR was increased. The relationship between these ...
... a which could be identified only at the basal heart rate was identical to the LVEDP. In the five patients studied during atrial fibrillation, the LVEDP was found to be equal to the PAEDP in one case and lower than the PAEDP in four, in three of which PVR was increased. The relationship between these ...
THE ROLE OF AUTONOMIC AND MYOCARDIAL FACTORS I.N
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
Comparison of Left Ventricular Contractility in Pressure and Volume
... present in the compensated phase of chronic regurgitation. In a different study, in the presence of normal contractility, myocardial stiffness and diastolic function were relatively more deteriorated in patients with aortic regurgitation than in patients with aortic stenosis.5 Different type of over ...
... present in the compensated phase of chronic regurgitation. In a different study, in the presence of normal contractility, myocardial stiffness and diastolic function were relatively more deteriorated in patients with aortic regurgitation than in patients with aortic stenosis.5 Different type of over ...
Effects of Long-Term Biventricular Stimulation for
... the beneficial mechanical systolic response.15,16 This suggests that QRS duration at baseline may be a relatively crude measure of dyssynchrony. In addition, in this study, no attempt was made to find the LV stimulation site that would result in the narrowest QRS duration. The finding that plasma no ...
... the beneficial mechanical systolic response.15,16 This suggests that QRS duration at baseline may be a relatively crude measure of dyssynchrony. In addition, in this study, no attempt was made to find the LV stimulation site that would result in the narrowest QRS duration. The finding that plasma no ...
STICH M19.RV dysfunction.Kukulski-JTCVS
... with or without surgical ventricular reconstruction is still unknown. The aim of the study was to assess the impact of right ventricular dysfunction on clinical outcome in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting with or without surgical ventricular reconstruc ...
... with or without surgical ventricular reconstruction is still unknown. The aim of the study was to assess the impact of right ventricular dysfunction on clinical outcome in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting with or without surgical ventricular reconstruc ...
sounds to right supraclavicular fossa
... present in 25 patients but was recorded in the right supraclavicular fossa in only 7 (28%). Intracardiac phonocardiography (high-fidelity catheter) was performed in six patients with left ventricular gallop sounds and in each instance arterial transmission of the third or fourth heart sound, or both ...
... present in 25 patients but was recorded in the right supraclavicular fossa in only 7 (28%). Intracardiac phonocardiography (high-fidelity catheter) was performed in six patients with left ventricular gallop sounds and in each instance arterial transmission of the third or fourth heart sound, or both ...
Implication of right ventricular dysfunction on long
... with or without surgical ventricular reconstruction is still unknown. The aim of the study was to assess the impact of right ventricular dysfunction on clinical outcome in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting with or without surgical ventricular reconstruc ...
... with or without surgical ventricular reconstruction is still unknown. The aim of the study was to assess the impact of right ventricular dysfunction on clinical outcome in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting with or without surgical ventricular reconstruc ...
Slayt 1 - yeditepetip4
... • Do the P waves all look alike? • Do the P waves occur at a regular rate? • Is there one P wave before each QRS? Interpretation? Normal P waves with 1 P wave for every QRS ...
... • Do the P waves all look alike? • Do the P waves occur at a regular rate? • Is there one P wave before each QRS? Interpretation? Normal P waves with 1 P wave for every QRS ...
Comparison of Echocardiographic Variables Between Systemic
... cardiac problems or risk factors for cardiovascular diseases. Both SLE and control groups underwent echocardiography for the assessment of the ventricular function and the sizes and diameters of the chambers. Two-dimensional STE was used for the measurement of the left ventricular (LV) global longit ...
... cardiac problems or risk factors for cardiovascular diseases. Both SLE and control groups underwent echocardiography for the assessment of the ventricular function and the sizes and diameters of the chambers. Two-dimensional STE was used for the measurement of the left ventricular (LV) global longit ...
Cardiac Resynchronization Therapy and Atrial Fibrillation
... (n= 26), and AF without AVJ ablation (n = 27). The primary outcomes were occurrence of cardiac death, hospitalization for HF, and improvement in NYHA class. There was a significant improvement in the NYHA class in all 3 groups. However, the proportion of responders was significantly lower in AF pati ...
... (n= 26), and AF without AVJ ablation (n = 27). The primary outcomes were occurrence of cardiac death, hospitalization for HF, and improvement in NYHA class. There was a significant improvement in the NYHA class in all 3 groups. However, the proportion of responders was significantly lower in AF pati ...
CRT-D - Medtronic
... therapy delivery, tissue damage, induction of an arrhythmia, device electrical reset, or device damage. Do not place transthoracic defibrillation paddles directly over the device. Certain programming and device operations may not provide cardiac resynchronization. For the leads, people with metal im ...
... therapy delivery, tissue damage, induction of an arrhythmia, device electrical reset, or device damage. Do not place transthoracic defibrillation paddles directly over the device. Certain programming and device operations may not provide cardiac resynchronization. For the leads, people with metal im ...
Editorial
... Correspondence to Robert S. Kass, PhD, Department of Pharmacology, College of Physicians & Surgeons, Columbia University, 630 W 168th ...
... Correspondence to Robert S. Kass, PhD, Department of Pharmacology, College of Physicians & Surgeons, Columbia University, 630 W 168th ...
Arrhythmia Risk and Obesity
... remodeling, metabolic factors, sympatho-vagal imbalance, clinical links (obstructive sleep apnea, cardiovascular comorbidities) and inflammation. The main mechanisms leading to ventricular arrhythmia and sudden cardiac death in obese individuals include cardiomyopathy, metabolic factors, sympathetic ...
... remodeling, metabolic factors, sympatho-vagal imbalance, clinical links (obstructive sleep apnea, cardiovascular comorbidities) and inflammation. The main mechanisms leading to ventricular arrhythmia and sudden cardiac death in obese individuals include cardiomyopathy, metabolic factors, sympathetic ...
Pathophysiology of heart failure following myocardial infarction
... oxide that is produced by healthy endothelium. Experiments in hyperlipidaemic rabbits have shown a 2.3-fold increase in superoxide anion generation that was reversed when the animals were given aldosterone blockade.5 Animal studies have suggested an inflammatory component to aldosterone induced vasc ...
... oxide that is produced by healthy endothelium. Experiments in hyperlipidaemic rabbits have shown a 2.3-fold increase in superoxide anion generation that was reversed when the animals were given aldosterone blockade.5 Animal studies have suggested an inflammatory component to aldosterone induced vasc ...
Connexin 43 Expression in Human Hypertrophied Heart Due to
... reduction of Cx43 at the intercalated disks and an increase of Cx43 at the lateral cell border (Matsushita et al. 1999, Peters et al. 1997). This gap junction remodeling may be associated with abnormal conduction representing a substrate for ventricular arrhythmias (Matsushita et al. 1999, Peters et ...
... reduction of Cx43 at the intercalated disks and an increase of Cx43 at the lateral cell border (Matsushita et al. 1999, Peters et al. 1997). This gap junction remodeling may be associated with abnormal conduction representing a substrate for ventricular arrhythmias (Matsushita et al. 1999, Peters et ...
Full Text - J
... This study sought to examine the relationships between right ventricular (RV) function and geometry, morbid obesity with and without the metabolic syndrome, and the effect of long-term weight loss. Obese (n = 153, BMI 41.2 ± 8.7 kg/m2) and healthy non-obese control subjects (n = 38, BMI 25.5 ± 3.3 k ...
... This study sought to examine the relationships between right ventricular (RV) function and geometry, morbid obesity with and without the metabolic syndrome, and the effect of long-term weight loss. Obese (n = 153, BMI 41.2 ± 8.7 kg/m2) and healthy non-obese control subjects (n = 38, BMI 25.5 ± 3.3 k ...
Left ventricular diastolic collapse in regional left heart
... Normal saline solution was infused into the left pericardial compartment at 5-ml intervals . Repeat hemodynamic and echocardiographic measurements were obtained at each period . The onset of left ventricular diastolic collapse, defined as a discrete, transient, inward motion of the left ventricular ...
... Normal saline solution was infused into the left pericardial compartment at 5-ml intervals . Repeat hemodynamic and echocardiographic measurements were obtained at each period . The onset of left ventricular diastolic collapse, defined as a discrete, transient, inward motion of the left ventricular ...
Further Insight into Mechanisms of Ventricular
... slow conduction (Kuck, et al., 1989), convincing evidence to support this possibility has been lacking. The astute observations of Fitzgerald et al. provide new insight into possible mechanisms of pleomorphic VT by demonstrating that a single region of slow conduction may indeed participate in the r ...
... slow conduction (Kuck, et al., 1989), convincing evidence to support this possibility has been lacking. The astute observations of Fitzgerald et al. provide new insight into possible mechanisms of pleomorphic VT by demonstrating that a single region of slow conduction may indeed participate in the r ...
Electrical cardioversion for atrial fibrillation and flutter
... Atrial fibrillation is an irregular heart rhythm starting from the upper chambers of the heart. It has a negative effect on the circulatory system and can lead to strokes. People are, therefore, often put on long-term blood thinners (either anti-coagulants or antiplatelet drugs), and may sometimes b ...
... Atrial fibrillation is an irregular heart rhythm starting from the upper chambers of the heart. It has a negative effect on the circulatory system and can lead to strokes. People are, therefore, often put on long-term blood thinners (either anti-coagulants or antiplatelet drugs), and may sometimes b ...
Electrical Storm: Incidence, Prognosis and Therapy
... Electrical storm is a state of cardiac electrical instability characterized by multiple episodes of ventricular arrhythmias within a relatively short period of time.1 The clinical definition of electrical storm is varied, somewhat arbitrary, and is a source of ongoing debate.2 Before cardioverter de ...
... Electrical storm is a state of cardiac electrical instability characterized by multiple episodes of ventricular arrhythmias within a relatively short period of time.1 The clinical definition of electrical storm is varied, somewhat arbitrary, and is a source of ongoing debate.2 Before cardioverter de ...
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.