Comparative Analysis of Three Projectile Stun Guns
... having a range of body weights. In this study, the electrical output could be increased up to 50 times the output charge of the normal X26, and the electrical output was increased in each animal until VF was observed. A safety factor was then estimated for each animal, which was found to be weight d ...
... having a range of body weights. In this study, the electrical output could be increased up to 50 times the output charge of the normal X26, and the electrical output was increased in each animal until VF was observed. A safety factor was then estimated for each animal, which was found to be weight d ...
Prognostic Significance of PVCs and resting heart rate, 2007
... All initial ECGs of consecutive veterans (outpatient and inpatient) who obtained ECGs for any reason at the Palo Alto VA Medical Center from April 1987 until December 1999 were considered in the study. From these 46,959 ECGs, those with atrial fibrillation and paced rhythms were excluded, leaving 45 ...
... All initial ECGs of consecutive veterans (outpatient and inpatient) who obtained ECGs for any reason at the Palo Alto VA Medical Center from April 1987 until December 1999 were considered in the study. From these 46,959 ECGs, those with atrial fibrillation and paced rhythms were excluded, leaving 45 ...
Left Ventricular Volume and Function Assessment: A Comparison
... 61.9%, 50%, and 47.6% of the patients, respectively. Three patients had a history of previous infarction. The LVESV, LVEDV, and LVEF, which were recorded during catheterization and echocardiography, are presented in Table 1. The agreement between the two methods (ventriculography and 2D echocardiogr ...
... 61.9%, 50%, and 47.6% of the patients, respectively. Three patients had a history of previous infarction. The LVESV, LVEDV, and LVEF, which were recorded during catheterization and echocardiography, are presented in Table 1. The agreement between the two methods (ventriculography and 2D echocardiogr ...
Left Ventricular Volume and Function Assessment: A Comparison
... 61.9%, 50%, and 47.6% of the patients, respectively. Three patients had a history of previous infarction. The LVESV, LVEDV, and LVEF, which were recorded during catheterization and echocardiography, are presented in Table 1. The agreement between the two methods (ventriculography and 2D echocardiogr ...
... 61.9%, 50%, and 47.6% of the patients, respectively. Three patients had a history of previous infarction. The LVESV, LVEDV, and LVEF, which were recorded during catheterization and echocardiography, are presented in Table 1. The agreement between the two methods (ventriculography and 2D echocardiogr ...
PDF - Circulation Research
... Both systolic pressure-volume area (PVA) and force-time integral (FM1) have been used as measures of oxygen consumption per beat (Vo2) in the isolated left ventricle. The reciprocal of the slope of the Vo2-PVA relation has been considered to reflect the chemomechanical energy transduction efficiency ...
... Both systolic pressure-volume area (PVA) and force-time integral (FM1) have been used as measures of oxygen consumption per beat (Vo2) in the isolated left ventricle. The reciprocal of the slope of the Vo2-PVA relation has been considered to reflect the chemomechanical energy transduction efficiency ...
Anatomy of the Atrioventricular Conduction System in
... the ostium of the coronary sinus. It measured 4 mm. in diameter. The more anterior defect was located under the area of the commissure between the anterior and septal leaflets of the tricuspid valve and between the tricuspid ring and the crista supraventrieularis. It measured 5 mm. in diameter. The ...
... the ostium of the coronary sinus. It measured 4 mm. in diameter. The more anterior defect was located under the area of the commissure between the anterior and septal leaflets of the tricuspid valve and between the tricuspid ring and the crista supraventrieularis. It measured 5 mm. in diameter. The ...
QUANTIFYING NON-AXIAL DEFORMATIONS IN RAT
... While it is clear that myocardium responds to mechanical stimuli, it is unknown whether myocytes transduce stress or strain. It is also unknown whether myofibers maintain lateral connectivity or move freely over one another when myocardium is deformed. Due to the lack of information about the myocar ...
... While it is clear that myocardium responds to mechanical stimuli, it is unknown whether myocytes transduce stress or strain. It is also unknown whether myofibers maintain lateral connectivity or move freely over one another when myocardium is deformed. Due to the lack of information about the myocar ...
Diastolic Heart Failure After Cardiac Surgery
... anemia is usually accompanied by an increase in cardiac mass due to volume overload. In the animal model, chronic anemia resulted in increased left ventricular end-diastolic pressure and decreased functional reserve which in turn can lead to diastolic dysfunction. It can also lead to tachycardia tha ...
... anemia is usually accompanied by an increase in cardiac mass due to volume overload. In the animal model, chronic anemia resulted in increased left ventricular end-diastolic pressure and decreased functional reserve which in turn can lead to diastolic dysfunction. It can also lead to tachycardia tha ...
City of Miami`s Public Access Defibrillation Program
... Over 400,000 people die each year in the US from sudden cardiac arrest. Cardiac arrest usually results from some underlying form of heart disease. Most cardiac arrests are due to abnormal heart rhythms called arrhythmias. Ventricular Fibrillation (VF) is the most common arrhythmia that causes cardia ...
... Over 400,000 people die each year in the US from sudden cardiac arrest. Cardiac arrest usually results from some underlying form of heart disease. Most cardiac arrests are due to abnormal heart rhythms called arrhythmias. Ventricular Fibrillation (VF) is the most common arrhythmia that causes cardia ...
Early repolarization in the inferolateral leads of the
... pointed to an associated locus in KCND3 (Kv4.3) gene, which encodes a subunit of the Ito channel, but the association did not reach genome-wide significance and could not be replicated in all study populations. In conclusion, the results of these studies demonstrated that the ER ECG pattern with hor ...
... pointed to an associated locus in KCND3 (Kv4.3) gene, which encodes a subunit of the Ito channel, but the association did not reach genome-wide significance and could not be replicated in all study populations. In conclusion, the results of these studies demonstrated that the ER ECG pattern with hor ...
Frequently Asked Questions About AEDs
... An AED is a device used to administer an electric shock through the chest wall to the heart. Built-in computers assess the patient's heart rhythm, judge whether defibrillation is needed, and then administer the shock. Audible and/or visual prompts guide the user through the process. How does an AED ...
... An AED is a device used to administer an electric shock through the chest wall to the heart. Built-in computers assess the patient's heart rhythm, judge whether defibrillation is needed, and then administer the shock. Audible and/or visual prompts guide the user through the process. How does an AED ...
Differentiating Types Of Wide-Complex Tachycardia To Determine
... AV re-entrant tachycardia). (See Figure 2.) Frequently, these rhythms present as narrow-complex tachycardia. However, conduction delay can occur in the setting of more-rapid heart rates, and rate-related refractory (or fatigue) conducting fibers of the AV nodal-His-Purkinje system will lead to QRS w ...
... AV re-entrant tachycardia). (See Figure 2.) Frequently, these rhythms present as narrow-complex tachycardia. However, conduction delay can occur in the setting of more-rapid heart rates, and rate-related refractory (or fatigue) conducting fibers of the AV nodal-His-Purkinje system will lead to QRS w ...
a finite element model of the human left ventricular systole, taking
... and adapting its activity to meet the body’s needs regardless whether we are sleeping or engaging in physical activities. It works continuously for the entire time of our life and pumps blood at a rate varying from 5 to 25 litters per minute in a healthy, not particularly trained adult. Due to the i ...
... and adapting its activity to meet the body’s needs regardless whether we are sleeping or engaging in physical activities. It works continuously for the entire time of our life and pumps blood at a rate varying from 5 to 25 litters per minute in a healthy, not particularly trained adult. Due to the i ...
OVEREXPRESSION OF ANG-(1-7) OR CARDIAC-SELECTIVE OVEREXPRESSION
... et al., 2009) (Rosamond et al., 2007). Prompt recognition and treatment is critical for preventing further damage to the myocardium. Heart Failure Heart failure is a condition when the heart can not pump enough blood to meet the body’s demand. The most common cause for the heart failure is ischemic ...
... et al., 2009) (Rosamond et al., 2007). Prompt recognition and treatment is critical for preventing further damage to the myocardium. Heart Failure Heart failure is a condition when the heart can not pump enough blood to meet the body’s demand. The most common cause for the heart failure is ischemic ...
A Cure for the Code Blues? Vasopressin, Steroid and Epinephrine
... a. 2 breaths every 30 seconds without advanced airway b. 1 breath every 6-8 seconds with advanced airway ii. Minimize excessive ventilation a. Increases intrathoracic pressure, decreases blood flow to vital organs b. Other complications: gastric inflation, regurgitation, aspiration C. Medications in ...
... a. 2 breaths every 30 seconds without advanced airway b. 1 breath every 6-8 seconds with advanced airway ii. Minimize excessive ventilation a. Increases intrathoracic pressure, decreases blood flow to vital organs b. Other complications: gastric inflation, regurgitation, aspiration C. Medications in ...
Left ventricular twist and untwist rate provide reliable measures of
... diastolic function that are often not obvious using traditional measurements of LV ejection fraction (EF). Clinically, one needs to understand myocardial performance which includes systolic and diastolic functional indices, and ultimately generates cardiac output. Therefore, a more intricate assessm ...
... diastolic function that are often not obvious using traditional measurements of LV ejection fraction (EF). Clinically, one needs to understand myocardial performance which includes systolic and diastolic functional indices, and ultimately generates cardiac output. Therefore, a more intricate assessm ...
quantitative echocardiographic methods for
... With that and the above stated in mind, it is evident that distinguishing ACS among all the patients with chest pain is a challenging task that requires effective tools for both diagnosis and risk stratification, considering the wide range of important differential diagnoses [6, 7] and the fact that ...
... With that and the above stated in mind, it is evident that distinguishing ACS among all the patients with chest pain is a challenging task that requires effective tools for both diagnosis and risk stratification, considering the wide range of important differential diagnoses [6, 7] and the fact that ...
It Takes “Heart” to Win: What Makes the Heart Powerful?
... ventricular pressures are still greater than atrial pressures, the AV valves are also closed, so pressure falls with no change in ventricular volume during phase 4. Stroke volume is the difference between the volume after filling (i.e., end-diastolic volume) and the volume after ejection (i.e., end- ...
... ventricular pressures are still greater than atrial pressures, the AV valves are also closed, so pressure falls with no change in ventricular volume during phase 4. Stroke volume is the difference between the volume after filling (i.e., end-diastolic volume) and the volume after ejection (i.e., end- ...
Closure of atrial septal defect in the adult. Cardiac remodeling is an
... change later on. The temporal pattern of the left ventricular changes, although going in an opposite direction, followed by and large those of the right heart. At the “one-year” examination after closure there was no statistically significant differences in right ventricular – right atrium pressure ...
... change later on. The temporal pattern of the left ventricular changes, although going in an opposite direction, followed by and large those of the right heart. At the “one-year” examination after closure there was no statistically significant differences in right ventricular – right atrium pressure ...
Acute Right Atrial and Ventricular Infarction
... a) lower oxygen demand in the right ventricular myocardium; b) much higher systolic-diastolic coronary blood flow ratio in the arteries that perfuse the right ventricle13; c) greater capacity of the right ventricle to extract oxygen under conditions of hemodynamic stress14; d) probable direct perfus ...
... a) lower oxygen demand in the right ventricular myocardium; b) much higher systolic-diastolic coronary blood flow ratio in the arteries that perfuse the right ventricle13; c) greater capacity of the right ventricle to extract oxygen under conditions of hemodynamic stress14; d) probable direct perfus ...
ECG - A Pictorial Primer
... number of QRS complexes in a 6-second period by 10. For very slow heart rates in which there are few QRS complexes in a 6-second interval, accuracy can be improved by multiplying the number of QRS complexes in a 12-second period by 5. ...
... number of QRS complexes in a 6-second period by 10. For very slow heart rates in which there are few QRS complexes in a 6-second interval, accuracy can be improved by multiplying the number of QRS complexes in a 12-second period by 5. ...
Left ventricular hypertrophy and the insulin resistance
... Under some circumstances, of which we today only know a handful, the mass of the left ventricle of the heart increases. A too large left ventricular mass is known as left ventricular hypertrophy (LVH). LVH is a very common condition. The prevalence of echocardiographic LVH in the general population ...
... Under some circumstances, of which we today only know a handful, the mass of the left ventricle of the heart increases. A too large left ventricular mass is known as left ventricular hypertrophy (LVH). LVH is a very common condition. The prevalence of echocardiographic LVH in the general population ...
Biphasic Clinical Summaries
... • To optimize for low initial and cumulative energy using a step-up protocol, select 70 J for the first shock and use small increases in energy if further shocks are needed. Each of these strategies should provide effective cardioversion therapy while substantially reducing the amount of peak curren ...
... • To optimize for low initial and cumulative energy using a step-up protocol, select 70 J for the first shock and use small increases in energy if further shocks are needed. Each of these strategies should provide effective cardioversion therapy while substantially reducing the amount of peak curren ...
Provisional PDF - BioMed Central
... controversy. On the one hand, echocardiography is imaging method in the assessment of cardiac (Tables 2 and 3). Summarizes the echocardiographic characteristics in all groups. LVH was present in MYS, MOC and MOS hamsters groups. No significant differences at baseline systolic and diastolic in all yo ...
... controversy. On the one hand, echocardiography is imaging method in the assessment of cardiac (Tables 2 and 3). Summarizes the echocardiographic characteristics in all groups. LVH was present in MYS, MOC and MOS hamsters groups. No significant differences at baseline systolic and diastolic in all yo ...
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.