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- Cardiac Arrhythmias Symposium (19)
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Full-Text Articles in Medicine and Health Sciences
Contents
MCV/Q, Medical College of Virginia Quarterly
Table of contents for MCV/Q, Medical College of Virginia Quarterly, 1973, Volume Nine, Number One.
Introduction, Charles L. Baird Jr.
Introduction, Charles L. Baird Jr.
MCV/Q, Medical College of Virginia Quarterly
This issue of the Medical College of Virginia Quarterly is devoted to the publication of the proceedings of the Cardiac Arrhythmias Symposium held at the Cavalier Hotel in Virginia Beach, Virginia from June 8-10, 1972. The reason for such emphasis upon the field of cardiac arrhythmias is primarily due to the fact that there has been an awakened interest in recent years in the problem of sudden death. It is now being appreciated that a significant number of deaths attributed to cardiovascular disease are due to cardiac arrhythmias, a potentially correctable disorder.
Introduction To The Phasic Effects Of The Vagus On Sinoatrial And Atrioventricular Nodes, Gordon Moe
Introduction To The Phasic Effects Of The Vagus On Sinoatrial And Atrioventricular Nodes, Gordon Moe
MCV/Q, Medical College of Virginia Quarterly
I want to emphasize that the vagus has effects upon both the sinus node and the A-V node. It slows sinus discharge, and it depresses, delays, or blocks atrioventricular transmission. It is also known that under certain conditions that discharge of vagal fibers to the heart may be phasic. From the physiological standpoint, it ought to be phasic, particularly at slow heart rates. The reason it should be phasic is that when the systolic pulse wave arrives at the baroreceptor regions of the aorta and of the carotid sinuses, it elicits a discharge of afferent fibers in those regions which …
Electrophysiology Of Concealed Conduction, E. Neil Moore
Electrophysiology Of Concealed Conduction, E. Neil Moore
MCV/Q, Medical College of Virginia Quarterly
Several figures are presented here to demonstrate the different mechanisms of concealed conduction in which microelectrodes were used to record from the A-V node and His-Purkinje system together with simultaneously recorded atrial and ventricular electrograms. Of course, in a standard ECG, one would not be able to determine what was occurring within the specialized A-V conduction system, since only the information provided by the atrial and ventricular electrograms (P wave and QRS complex) would be available for interpretation.
Clinical Significance Of Exit Block, Irany M. De Azevedo, Yoshio Watanabe, Leonard S. Dreifus
Clinical Significance Of Exit Block, Irany M. De Azevedo, Yoshio Watanabe, Leonard S. Dreifus
MCV/Q, Medical College of Virginia Quarterly
Clinical features of exit block were shown and its probable electrophysiological mechanisms discussed. Based on recent electrophysiological studies, it is emphasized that exit block is a result of depressed conduction surrounding the ectopic pacemaker.
Ventricular Tachyarrhythmias, Borys Surawicz
Ventricular Tachyarrhythmias, Borys Surawicz
MCV/Q, Medical College of Virginia Quarterly
The mechanisms of ventricular tachyarrhythmias fall into two broad categories of increased automaticity and reentry. It is usually difficult to differentiate clinically between the two mechanisms; however, I plan to discuss certain approaches that may be helpful in this regard.
Workshop Presided By William A. Dickinson, Jr., William A. Dickinson Jr.
Workshop Presided By William A. Dickinson, Jr., William A. Dickinson Jr.
MCV/Q, Medical College of Virginia Quarterly
Workshop presided by William A. Dickinson, Jr. Transcript of three cases that were discussed.
Arterial Blood Gases: Their Meaning And Interpretation, Walter J. O'Donohue Jr.
Arterial Blood Gases: Their Meaning And Interpretation, Walter J. O'Donohue Jr.
MCV/Q, Medical College of Virginia Quarterly
The measurement of arterial blood gases is essential in the management of respiratory failure and in the diagnostic assessment of the nature and severity of pulmonary disease. Adequate therapy for patients with acute respiratory insufficiency is often impossible without the information obtained from arterial blood gases. These studies must be readily available around the clock, including nights, weekends, and holidays and should not have to depend upon a technician called in from home.
Non-Ventilator Management Of Respiratory Failure: The Ventimask, William B. Hunt Jr.
Non-Ventilator Management Of Respiratory Failure: The Ventimask, William B. Hunt Jr.
MCV/Q, Medical College of Virginia Quarterly
This paper will detail the conservative management of acute respiratory failure in patients with chronic respiratory failure due to chronic bronchitis and emphysema. It is important to recognize that this is a very specific group of patients. They have had a chronic hypoxia and hypercarbia for months or years preceding their current episode of acute respiratory failure.
Principles Of Inhalation Therapy, Walter J. O'Donohue Jr.
Principles Of Inhalation Therapy, Walter J. O'Donohue Jr.
MCV/Q, Medical College of Virginia Quarterly
With the increasing complexity of ventilatory equipment and the rapid development of new techniques for respiratory care, it has become progressively more difficult for the average physician to keep pace with clinical and technical advancements. The management of acute respiratory failure is now a demanding art which requires a broad knowledge of cardiopulmonary physiology and sophistication in the use of complicated equipment. Careful attention to detail is often the critical factor that determines survival. The mortality from acute respiratory failure has been substantially reduced in respiratory intensive care units where there are well trained teams of physicians, nurses, and technicians …
How To Get Patients On And Off Respirators, Terring W. Heironimus Iii
How To Get Patients On And Off Respirators, Terring W. Heironimus Iii
MCV/Q, Medical College of Virginia Quarterly
This title implies that one has already decided that one's patient needs to be artificially ventilated, that is, that he is in respiratory failure. How does one diagnose respiratory failure? Much of what I have to say in this regard is in terms of arbitrary limits, values, and guidelines. Since these guidelines are arbitrary, there may exist legitimate grounds for differences of opinion about some of them. However, we have found these guidelines to be quite helpful, and experience would indicate that they are reasonable.
Complications Of Mechanical Ventilation, Orhan Muren
Complications Of Mechanical Ventilation, Orhan Muren
MCV/Q, Medical College of Virginia Quarterly
With increasing utilization of mechanical ventilation during the past decade or so, complications related to its use have also increased. Ventilators are primarily indicated when acceptable safe levels of oxygenation and ventilation cannot be maintained by other means.
Management Of Severe Asthma, William B. Hunt Jr.
Management Of Severe Asthma, William B. Hunt Jr.
MCV/Q, Medical College of Virginia Quarterly
In this summary of therapy for severe asthma there is no mention of etiologic factors. The author presumes that if infection is the primary factor in the progression to severe asthma that this will be recognized and appropriately treated. A chest x-ray must be an initial laboratory study for the recognition of pneumonia or complicating pneumothorax. However, unlike respiratory failure due to emphysema, here the specific therapy of the altered pulmonary physiology is of paramount importance.
Trauma Resulting In Respiratory Failure, James W. Brooks
Trauma Resulting In Respiratory Failure, James W. Brooks
MCV/Q, Medical College of Virginia Quarterly
Respiratory failure may occur secondary to thoracic trauma. Several important conditions develop as a result of chest injuries and may occur singly, or in combination, in patients with injuries from any cause. Unrecognized and therefore without proper management, the results are necessarily poor. If recognized and their mode of production is understood, treatment may be simple.
Contents
MCV/Q, Medical College of Virginia Quarterly
Table of contents for MCV/Q, Medical College of Virginia Quarterly, 1973, Volume Nine, Number Three.
A Twenty-Year Experience With Surgery For Ureteral Reflux, John Hutch
A Twenty-Year Experience With Surgery For Ureteral Reflux, John Hutch
MCV/Q, Medical College of Virginia Quarterly
This is a transcription of a lecture presented by Dr. John Hutch at the First Annual R. Carl Bunts Lecture in Urology, May 25, 1972.
Psychiatric Problems In Urology, James L. Mathis
Psychiatric Problems In Urology, James L. Mathis
MCV/Q, Medical College of Virginia Quarterly
In summary, the urologist cannot escape from a major responsibility for his patients' emotional components. The very area of his work is highly charged with emotional potential, primarily of a sexual nature. A careful sexual history is essential to the full understanding of the symptoms of many urological complaints and is equally necessary for the prevention of emotional complications to genital surgery.
The Urologist And The Law, Jack B. Russell
The Urologist And The Law, Jack B. Russell
MCV/Q, Medical College of Virginia Quarterly
Some of the matters I have referred to may seem unusual or unlikely and thus may not be long remembered. Let me reiterate, however, the importance of two items in particular. If nothing else remains long in your minds, do not forget that complete and adequate records are essential, both in the hospital and in the office. Nothing else will take their place when they are needed. Finally, keep in mind always the significance of informed consent. It is a rapidly changing principle and one which touches literally every field of medicine. It may be difficult to accept in all …
Renal Hypertension, Eugene F. Poutasse
Renal Hypertension, Eugene F. Poutasse
MCV/Q, Medical College of Virginia Quarterly
The advances in our knowledge of renal hypertension over the last 75 years represents outstanding accomplishments in experimental and clinical medicine. A review of the highlights of this important investigation in hypertension should begin with Tigerstedt and Bergman's work in Scandinavia which demonstrated in 1898, that extracts of kidney possessed a hypertensive action. They gave the name "renin" to the impure substance which produced this effect. For the next 30 years much work was done on the vasoconstrictor action of extracts of the adrenal medulla, the nervous system and the kidney.
Urological Care Of The Paralyzed Patient, Robert H. Hackler
Urological Care Of The Paralyzed Patient, Robert H. Hackler
MCV/Q, Medical College of Virginia Quarterly
The paraplegic injured during World War I had only a 10% chance of surviving the first year. Only 20% of the American paraplegics could even be evacuated. A great majority of the deaths were caused by urinary tract sepsis. Starting in the mid and late 1940's, however, with the discovery of broad spectrum antibiotics, many of the early complications were eliminated and the survival rate greatly improved. Since 1946, over 2,000 patients have been admitted to the McGuire Veterans Administration Hospital. This spinal cord injury service receives approximately 400-500 admissions per year with about 70 being new patients.
Pediatric Uro-Radiology, Herman Grossman
Pediatric Uro-Radiology, Herman Grossman
MCV/Q, Medical College of Virginia Quarterly
"Routine" radiologic studies do not, often enough, concentrate on the part of the anatomy and physiology of importance for the diagnosis. The close cooperation between the pediatrician, urologist and the radiologist will insure more useful uro-radiographic studies on which rational clinical decisions can be based. The child's signs and symptoms, as well as the anatomic and physiologic information needed, dictate the type and order of the radiographic studies. It is beyond the scope of this paper to go into the indications for specific uro-radiographic studies. The radiographic techniques will be presented.
Advancing Technology Of Clinical Laboratory Practice, George Z. Williams
Advancing Technology Of Clinical Laboratory Practice, George Z. Williams
MCV/Q, Medical College of Virginia Quarterly
In spite of the temporary antitechnology attitude of a portion of our society, the future will be an era of automated technology. Buckminster Fuller has reviewed the progress of industrial technology and points out that continuing scientific advances are inevitable and that technical applications will provide more equitable distribution of wealth, more time, more opportunity for education and intellectual pursuits.
Meaningful Toxicology, Robert V. Blanke
Meaningful Toxicology, Robert V. Blanke
MCV/Q, Medical College of Virginia Quarterly
The scope of toxicology, therefore, may extend from the study of a single element such as lead to a complex, chemically uncharacterized substance such as snake venom; from an overdose of heroin to the effects of long-term exposure to low levels of pesticides on anticonvulsant therapy. For the purpose of this discussion, we shall narrow the limits of the broad field of toxicology considerably, but it is important to be aware of the breadth and depth to which toxicology may at times extend.
The Modernization Of The Autopsy: Application Of Ultrastructural And Biochemical Methods To Human Disease, Benjamin F. Trump, Jon M. Valigorsky, Jane H. Dees, Wolfgang J. Mergner, Kook M. Kim, Raymond T. Jones, Robert E. Pendergrass, Joel Garbus, Julio H. Garcia, Jesus E. Viloria, Junichi Tanaka, Hannu Kalimo, Yoshinari Kamijyo, R. Adams Cowley
The Modernization Of The Autopsy: Application Of Ultrastructural And Biochemical Methods To Human Disease, Benjamin F. Trump, Jon M. Valigorsky, Jane H. Dees, Wolfgang J. Mergner, Kook M. Kim, Raymond T. Jones, Robert E. Pendergrass, Joel Garbus, Julio H. Garcia, Jesus E. Viloria, Junichi Tanaka, Hannu Kalimo, Yoshinari Kamijyo, R. Adams Cowley
MCV/Q, Medical College of Virginia Quarterly
The autopsy has provided, and still provides, the stimulus for many attempts to reproduce disease in experimental animal models. This approach has become increasingly difficult, however, in the case of human disease, principally shock. The study of some pathological states in animal models requires testing in several species and final confirmation in man before this knowledge can be applied to living patients. In our studies the application of cell biology techniques at autopsy has permitted the generation of new hypotheses which are more amenable to further exploration in experimental models and can be more precisely related to human disease.
The Value Of Chemical Screening Profiles On Blood, Seymour Bakerman
The Value Of Chemical Screening Profiles On Blood, Seymour Bakerman
MCV/Q, Medical College of Virginia Quarterly
Chemical screening profiles on blood specimens are designed to yield information that may lead to new and additional clinical diagnoses, to revision of clinically established diagnoses, to confirmed impressions of the physician and to following the course of diseases during a patient's hospitalization. Screening profiles on blood are designed to indicate disease of the liver, kidney, heart, striated muscle and other organs; they may be helpful in the diagnosis of anemia, diabetes mellitus, gout, congestive heart failure, osteomalacia, and hyperlipidemia, hyperparathyroidism and other diseases. When these screening profiles were first introduced, there was widespread skepticism among physicians as to their …
Multitest Screening In Hematology, Charles L. Johnston Jr.
Multitest Screening In Hematology, Charles L. Johnston Jr.
MCV/Q, Medical College of Virginia Quarterly
The concept of multitest screening for hematological disorders is not necessarily a new one. Implementation of such ideas has recently become possible, for the automated electronic instruments performing sequential multiple analyses within very short periods of time are a very significant advancement in the technology of the hematology laboratory. It must be emphasized, however, that the value of such instrumentation lies not only in the rapidity, but also in the accuracy and precision as well as the number and nature of the tests performed. While the data on samples have been reported on individual patients three and a half years …
The Gouaux-Ashman Phenomenon: His Bundle Recordings, Benjamin J. Scherlag
The Gouaux-Ashman Phenomenon: His Bundle Recordings, Benjamin J. Scherlag
MCV/Q, Medical College of Virginia Quarterly
In conclusion, it is important to state the use of His bundle-electrocardiography in differentiating supraventricular beats with aberration from ventricular beats requires a critical approach to the interpretations of deflections appearing in the P-R segment. The use of quantitative rather than qualitative tests is essential when only the His bundle recording is used as opposed to the simultaneously recorded activity from the proximal bundle branches. In some cases, His bundle pacing may be helpful in reproducing spontaneously occurring aberrant patterns.
Surgery Of The Genitalia In Children, Charles J. Devine
Surgery Of The Genitalia In Children, Charles J. Devine
MCV/Q, Medical College of Virginia Quarterly
I shall confine my paper to the external male genitalia. Most of the problems that we have dealt with have been congenital from simple meatal strictures to more severe, although not necessarily more serious, situations. In the last 18 years, I have worked closely with Dr. Charles Horton, and much of this report represents our joint efforts.
Utilization Of Blood And Its Products, Robert D. Langdell
Utilization Of Blood And Its Products, Robert D. Langdell
MCV/Q, Medical College of Virginia Quarterly
At present time there are a number of blood components that are more suitable for transfusion purposes than is whole blood. In order to make maximum use of blood, it is necessary that there be close cooperation between the blood bank personnel and those responsible for patient care.
Laboratory Aspects Of Venereal Disease, Mario R. Escobar
Laboratory Aspects Of Venereal Disease, Mario R. Escobar
MCV/Q, Medical College of Virginia Quarterly
Introducing the laboratory aspects of venereal diseases, I would like to define the criteria according to which certain infectious diseases are considered to be "sexually transmitted." The expression "sexually transmitted disorder" is less weighted with moral overtones than the term "venereal" and may therefore be more acceptable to both medical practitioners and the general public.