Estimation of Cardiac Function by Means of Radio-cardiographic Function Analysis

1978 ◽  
Vol 17 (05) ◽  
pp. 203-205
Author(s):  
E. Lösel ◽  
N. Kleine ◽  
G. Hoffmann
Keyword(s):  
Pressure Pulse ◽  
Function Analysis ◽  
Simple Procedure ◽  
Ejection Velocity ◽  
Ejection Time ◽  
Pulmonary Vessels ◽  
Cardiac Dynamics ◽  
Filling Time ◽  
The Right ◽  
Enddiastolic Volume

The radiocardiographic function analysis represents a relatively simple procedure for the clinician to collect information concerning the changes of cardiac dynamics.The advantage of this method is to register non-invasively changes in cardiac dynamics at rest and during exercise such as those of enddiastolic volume, stroke volume, endsystolic volume, ejection time and filling time, and to permit the calculation of mean ejection velocity, etc.After insertion of a cardiac catheter, it is possible to record the corresponding pressure pulse in the right ventricle or in the pulmonary vessels simultaneously.

About the Possibilities of Registration of Drug Influence by Means of Radiocardiographic Function Analysis

1981 ◽  
Vol 20 (05) ◽  
pp. 236-240
Author(s):  
N. Kleine ◽  
G. Hoffmann ◽  
E. Lösel
Keyword(s):  
Heart Rate ◽  
Physical Exercise ◽  
Heart Muscle ◽  
Function Analysis ◽  
Control Group ◽  
Ejection Time ◽  
Cardiac Dynamics ◽  
Healthy Control ◽  
Drug Influence ◽  
Enddiastolic Volume

Changes in cardiac dynamics were analyzed by means of radiocardiographic function analysis under an infusion of epinephrine using the method of RAB. Typical changes in heart rate, stroke volume and blood pressure were observed after the application of epinephrine. Compared to examinations under physical exercise in case of healthy control subjects there was no typical decrease of enddiastolic volume dependent on the heart rate. Ejection time and ejection velocity were placed within the variation compared to values of a control group under physical exercise but there was a steeper increase of the curve under the effect of epinephrine. Under the influence of SolcoserylR no significant change could be observed in this series of tests compared to the basic values. The effect of epinephrine was changed by SolcoserylR in the way of an essentially smaller rise in heart rate and of a definite prolongation in diastolic time. A change in ejection time under the influence of epinephrine after the application of SolcoserylR could not be found. This allows the conclusion, that under the influence of SolcoserylR and after the administration of epinephrine better conditions for the metabolic restitution of heart muscle are given and consequently a direct effect of SolcoserylR on the heart muscle can be assumed.

scholarly journals Immune Thromboses of the Pulmonary Vessels

1977 ◽  
Author(s):  
S.V. Andreev ◽  
A.A. Kubatiev
Keyword(s):  
Right Ventricle ◽  
Vascular Wall ◽  
True Nature ◽  
Pulmonary Vessels ◽  
Arterial Blood ◽  
Compensatory Hyperfunction ◽  
Antigenic Complex ◽  
Pulmonary Arterial ◽  
The Right

According to current concepts, pathogenesis of intravascular trombus formation is underlaid by three crucial factors: lesion of the vascular wall, impairment of hemodynamics and hemostatic properties of the blood. While admitting the important role of each of these factors, one should acknowledge that the true nature of thrombosis is much more complicated and does not always fit the framework of this triad. In our experiments on rabbits, it was demonstrated that the thrombotic process in the basin of the pulmonary vessels could be successfully reproduced even in intact animals under conditions of disturbed immune homeostasis. A distinctive feature of immune thrombosis of the pulmonary vessels was a generalized lesion of the microcirculatory bed, gradual increase in the thrombotic masses and involvement of the major branches of the pulmonary vessels (PV). Morphologically, a picture of lymphoid-cellular infiltration and localization of the antigenic complex in the affected PV was revealed. As a result of progressive decrease in the pulmonary arterial blood circulation and increasing resistance in the system of the lesser circulation there were noted, already during the first hours after the onset of the capillary thrombosis, a compensatory hyperfunction of the right ventricle of the heart which was manifested in its highly increased contractility, higher levels of cyclic AMP and phosphorylation potential. At a later period, however, the compensatory possibilities of the right ventricle of the heart failed to overcome this resistance with resulting incompetence of the organ starting to develop within 2-3 days.

scholarly journals Double rhomboidal flap for reconstruction of large surgical defect of the labial commissure

2012 ◽  
Vol 87 (3) ◽  
pp. 456-458 ◽  
Author(s):  
Pedro Andrade ◽  
Ana Brinca ◽  
Ricardo Vieira ◽  
Américo Figueiredo
Keyword(s):  
Basal Cell Carcinoma ◽  
Cell Carcinoma ◽  
Male Patient ◽  
Surgical Complications ◽  
Simple Procedure ◽  
Donor Skin ◽  
Surgical Options ◽  
Total Preservation ◽  
The Right ◽  
Oral Commissure

Closure of perioral surgical defects involving the oral commissures is highly challenging. We describe a 69-year-old male patient with a large basal cell carcinoma of the right perioral region, extending to the right oral commissure. This lesion was radically excised, and the resulting surgical defect was closed using a homolateral double opposing rhomboidal flap. The final result was esthetically very satisfactory, with total preservation of lip function. Double opposing rhomboidal flaps are viable surgical options for the reconstruction of surgical defects involving the perioral area and oral commissures. In this relatively simple procedure, donor skin is obtained from the nearby cheek and mandibular areas, under low risk of surgical complications, preserving lip function without distortion of the labial anatomy.

Midlatency respiratory-related somatosensory activity and perception of oral pressure pulses in normal humans

2001 ◽  
Vol 90 (6) ◽  
pp. 2048-2056 ◽  
Author(s):  
J. Andrew Daubenspeck ◽  
Harold L. Manning ◽  
John C. Baird
Keyword(s):  
Evoked Potentials ◽  
Pressure Pulse ◽  
Applied Pressure ◽  
Normal Subjects ◽  
Magnitude Production ◽  
Global Field Power ◽  
Oral Pressure ◽  
Pressure Pulses ◽  
Standard Pressure ◽  
The Right

A direct relationship exists within subjects between midlatency features (<100 ms poststimulus) of respiratory-related evoked potentials and the perceived magnitude of applied oral pressure pulse stimuli. We evaluated perception in 18 normal subjects using cross-modality matching of applied pressure pulses via grip force and estimated mechanoafferent activity in these subjects by computing the global field power (GFP) from respiratory-related evoked potentials recorded over the right side of the scalp. We compared across subjects 1) the predicted magnitude production for a standard pressure pulse and 2) the slope (β) and 3) the intercept (INT) of the Stevens power law to the summed GFP over 20–100 ms poststimulus. Both the magnitude production for a standard pressure pulse and the β showed an inverse relationship with the summed GFP over 20–100 ms poststimulus, although there was no relationship between INT and the summed GFP. This may partially reflect characteristics of the mechanosensors and surely includes aspects of cognitive judgment, because we found and corrected for a high correlation between, respectively, β (and INT) for pressure pulses and β (and INT) for estimation of line lengths, a nonrespiratory modality. The relatively shallow, even inverse GFP-to-perception relationship suggests that, despite marked differences in the magnitude of afferent traffic, normal subjects seem to perceive things similarly.

Dynamic cerebral autoregulation during brain activation paradigms

2005 ◽  
Vol 289 (3) ◽  
pp. H1202-H1208 ◽  
Author(s):  
Ronney B. Panerai ◽  
Michelle Moody ◽  
Penelope J. Eames ◽  
John F. Potter
Keyword(s):  
Transfer Function ◽  
Cerebral Autoregulation ◽  
Function Analysis ◽  
Brain Activation ◽  
Hemispheric Lateralization ◽  
Step Response ◽  
Arterial Blood ◽  
Transfer Function Analysis ◽  
The Right ◽  
Dynamic Cerebral Autoregulation

Dynamic cerebral autoregulation (CA) describes the transient response of cerebral blood flow (CBF) to rapid changes in arterial blood pressure (ABP). We tested the hypothesis that the efficiency of dynamic CA is increased by brain activation paradigms designed to induce hemispheric lateralization. CBF velocity [CBFV; bilateral, middle cerebral artery (MCA)], ABP, ECG, and end-tidal Pco2 were continuously recorded in 14 right-handed healthy subjects (21–43 yr of age), in the seated position, at rest and during 10 repeated presentations (30 s on-off) of a word generation test and a constructional puzzle. Nonstationarities were not found during rest or activation. Transfer function analysis of the ABP-CBFV (i.e., input-output) relation was performed for the 10 separate 51.2-s segments of data during activation and compared with baseline data. During activation, the coherence function below 0.05 Hz was significantly increased for the right MCA recordings for the puzzle tasks compared with baseline values (0.36 ± 0.16 vs. 0.26 ± 0.13, P < 0.05) and for the left MCA recordings for the word paradigm (0.48 ± 0.23 vs. 0.29 ± 0.16, P < 0.05). In the same frequency range, significant increases in gain were observed during the puzzle paradigm for the right (0.69 ± 0.37 vs. 0.46 ± 0.32 cm·s−1·mmHg−1, P < 0.05) and left (0.61 ± 0.29 vs. 0.45 ± 0.24 cm·s−1·mmHg−1, P < 0.05) hemispheres and during the word tasks for the left hemisphere (0.66 ± 0.31 vs. 0.39 ± 0.15 cm·s−1·mmHg−1, P < 0.01). Significant reductions in phase were observed during activation with the puzzle task for the right (−0.04 ± 1.01 vs. 0.80 ± 0.86 rad, P < 0.01) and left (0.11 ± 0.81 vs. 0.57 ± 0.51 rad, P < 0.05) hemispheres and with the word paradigm for the right hemisphere (0.05 ± 0.87 vs. 0.64 ± 0.59 rad, P < 0.05). Brain activation also led to changes in the temporal pattern of the CBFV step response. We conclude that transfer function analysis suggests important changes in dynamic CA during mental activation tasks.

scholarly journals VATS right upper posterior segmentectomy with anomalous bronchiand pulmonary vessels: a case report and literature review

2020 ◽  
Author(s):  
Jianbin Zhang ◽  
Yilv Zhu ◽  
Hongwei Li ◽  
Caihua Yu ◽  
Weiwei Min
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Rare Case ◽  
Anatomic Variation ◽  
Three Dimensional ◽  
Posterior Segment ◽  
Detailed Model ◽  
Case Presentation ◽  
Pulmonary Vessels ◽  
The Right

Abstract BackgroundAnatomic variation may increase the difficulty and risk for anatomic segmentectomy. The preoperative three-dimensional computed tomography bronchography and angiography(3D-CTBA) can provide a detailed model of the segmental structure, and contribute to precise and safe segmentectomy.Case presentationWe report a case with anomalous bronchi and pulmonary vessels in the right upper posterior segment (RS2), under the guidance of 3D-CTBA, anatomic RS2segmentoctomywas performed accurately and safely, the postoperative condition was uneventful.ConclusionsThis rare case highlights the importance of 3D-CTBA to guild accurate segmentectomy with anatomic variation.

scholarly journals VATS right posterior segmentectomy with anomalous bronchi and pulmonary vessels: a case report and literature review

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Jianbin Zhang ◽  
Yilv Zhu ◽  
Hongwei Li ◽  
Caihua Yu ◽  
Weiwei Min
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Rare Case ◽  
Anatomic Variation ◽  
Three Dimensional ◽  
Posterior Segment ◽  
Detailed Model ◽  
Case Presentation ◽  
Pulmonary Vessels ◽  
The Right

Abstract Background Anatomic variation may increase the difficulty and risk of anatomic segmentectomy. The preoperative three-dimensional computed tomography bronchography and angiography (3D-CTBA) can provide a detailed model of the segmental structure, and contribute to precise and safe segmentectomy. Case presentation This is a case of anomalous bronchi and pulmonary vessels in the right upper posterior segment (RS2). Under the guidance of 3D-CTBA, anatomic RS2 segmentectomy was performed accurately and safely. The postoperative condition was uneventful. Conclusions This rare case highlights the importance of 3D-CTBA to guild accurate segmentectomy with anatomic variation.

Neonatal Circulatory Changes: An Echocardiographic Study

PEDIATRICS ◽  
1977 ◽  
Vol 59 (3) ◽  
pp. 338-344
Author(s):  
Thomas Riggs ◽  
Stephen Hirschfeld ◽  
Connie Bormuth ◽  
Avroy Fanaroff ◽  
Jerome Liebman
Keyword(s):  
Right Ventricular ◽  
Systolic Time Intervals ◽  
Left Ventricular ◽  
Ventricular Ejection ◽  
Left Ventricular Ejection ◽  
Ejection Time ◽  
Time Intervals ◽  
Systolic Time ◽  
The Right ◽  
Ventricular Ejection Time

Serial echocardiograms were performed in the first three days of life on 38 normal full-term infants. Right ventricular systolic time intervals were measured from the pulmonic valve echogram and left ventricular systolic time intervals were determined from the aortic valve echogram. The heart rate, left ventricular pre-ejection period (LPEP), left ventricular ejection time (LVET), and LPEP/LVET ratio showed insignificant variation with increasing postnatal age. The right ventricular pre-ejection period (RPEP) shortened, the right ventricular ejection time (RVET) lengthened, and the RPEP/RVET ratio decreased with increasing age. The findings suggested that alterations in the RPEP/RVET ratio reflected the decreasing pulmonary artery diastolic pressure and pulmonary vascular resistance of the early neonatal period and may be valuable in the noninvasive evaluation of the newborn's pulmonary vascular bed.

Progressive changes in cardiovascular function after unilateral heart irradiation

1964 ◽  
Vol 206 (2) ◽  
pp. 289-293 ◽  
Author(s):  
H. L. Stone ◽  
V. S. Bishop ◽  
A. C. Guyton
Keyword(s):  
Left Ventricle ◽  
Arterial Pressure ◽  
Blood Volume ◽  
Pulse Rate ◽  
Left Atrial ◽  
Pressure Pulse ◽  
Atrial Pressure ◽  
Right Atrial ◽  
Before And After ◽  
The Right

Chronic heart failure was produced by giving 20,000 r Co60 irradiation to either the right or left ventricle in nine closed-chest animals. Measurements of right and left atrial pressures, arterial pressure, pulse rate, body weight, and blood volume were made before and after irradiation. The right and left atrial pressures rose progressively until death in three animals irradiated on the right side. In six animals irradiated on the left side, the left atrial pressure rose progressively, but the right atrial pressure either did not rise or rose only during the latter stages of failure. Declining arterial pressure and increasing pulse rate were common to both groups. Increases in blood volume were observed in all animals, but this increase was only significant in the group irradiated on the left side. At autopsy, 70–100% of the right ventricular muscle was damaged in dogs irradiated on the right side, and 40–70% of the left ventricle in dogs irradiated on the left side. Hydrothorax and liver congestion were found in the right-sided group and pulmonary congestion in the left-sided group.

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