Recent Advances in Pulmonary Imaging: Digital Imaging and Computer-Aided...
Digital Imaging and Computer-Aided Diagnosis Digital Techniques Rapid advances in electronics and computer technology over the past 20 years have created new possibilities for imaging with x rays....
View ArticleRecent Advances in Pulmonary Imaging: Energy Subtraction Radiography
Energy Subtraction Radiography A further advance in digital chest radiography is dual energy subtraction (ES) radiography. Here, instead of a single storage phosphor plate, two plates are used with a...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
In patients with complete heart block with normal sinoatrial function, dual chamber pacing can maintain atrioventricular synchrony and provide for chronotropic response during exercise. However, its...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
Physiologic control of pacing rate by measuring respiratory change has been suggested. Recent technologic advances have made the sensing of respiration possible in two forms of the respiration-sensing,...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
This is achieved using a tripolar electrode configuration comprised of a standard bipolar electrode and the pacemaker casing. The source of electric current for impedance measurement consists of the...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
Bacemaker Programming In both groups of patients, the pacemaker was programmed to achieve a pacing rate of about 100 beats per minute at the end of stage 1 of the Bruce protocol. The lower rate was set...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
4. Effects of arm swinging. While holding the breath, the arm on the side of the pacemaker was swung at 10 to 60 (at 10 times per minute increment) times per minute. The rate of swinging was...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
The rate responses during brief treadmill exercise at different speeds and gradients are shown in Figure 4. In both groups of patients, the pacing rates increased as the patients walked at faster...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
Complications observed with Meta were related to implantation. In two patients, a hematoma developed at the site of implantation but subsided spontaneously. In one patient, lead dislodgement after...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
Few patients perform continuous treadmill exercise in everyday life. During brief activities (walking and stair climbing), the direction of rate response was found to be appropriate to the work load....
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
Arm swinging is an accompaniment of many activities, such as walking. Both pacemakers responded to arm swinging during apnea. We and others have observed that arm swinging can alter the rate response...
View ArticleSingle-chamber Cardiac Pacing with Two Forms of Respiration-controlled...
This may be attributed to the more pronounced activity-sensing property of the Biorate pacemaker which improved its rate response at low levels of activity. Although both forms of respiratory sensing...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
The recent advances in fiberoptic reflectometry systems permit continuous mixed venous oxygen saturation (Sv02) measurement by a catheter placed in the pulmonary artery. Close correlation between Sv02...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
Hemodynamic measurements include cardiac output determined in triplicate by thermodilution using the Edwards 9520A computer. Variability in subsequent cardiac output measurements was minimized by...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
There was no significant difference in arterial lactate. The mean values of cardiac index, Sv02, and lactate measured initially, at the time of maximum cardiac index and during the final periods are...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
When analyzing the relationship between an Sv02 value of less than 60 percent and arterial lactate levels greater than the 2.5 mmol/L, we found an increase in lactate levels at reduced Sv02 values...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
In undertaking this study, we wished to confirm the usefulness of monitoring mixed venous oxygen saturation continuously as an indicator of cardiac output and to confirm the safety of substituting Sv02...
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
Schmidt et al suggested that a good correlation existed only between Sv02 and oxygen extraction while Waller and colleagues were able to demonstrate a good correlation between Sv02 and cardiac output....
View ArticleContinuous Monitoring of Mixed Venous Oxygen Saturation in Patients with...
The lack of confidence in continuously monitored Sv02, except at extremely low levels, is not unusual among ICU personnel. In our practice, it has therefore been necessary to continue CO measurements...
View ArticleAutomaticity of the SN and A-V Junctional Tissue Before and After Chemical...
Inadequate escape of subsidiary pacemakers from atria, A-V junctional tissues or ventricles is the basic mechanism responsible for clinical cerebral ischemic symptoms in patients with sick sinus...
View Article
