scholarly journals Hunting high and low for the right blood pressure after cardiac arrest

Author(s):  
Markus B. Skrifvars
2019 ◽  
Vol 43 (1) ◽  
pp. 21-25
Author(s):  
Mohammed Senna Hassan

   Twenty Iraqi ducks hearts ( 10 male and 10 female ) have been  used for   demonstration  and illustration of heart's valves  and chambers  as well as  anatomical   and morphological site of view to explain what modifications had been take place for ducks heart  to perform  his normal life at the  circumstances  of  high  blood  pressure  and  pulse  rate. The heart  which has distinctly pointed  apex  was  built   in simple  manner located  in a transparent  taught  heart  pericardial  sac. It   was pyramidal in shape  externally  and  has a longitudinal  salcus  passing  to the  right  side, the  anterior of  the   heart  is  divided  into two  unequal  anterior  chamber  similar  to  those of mammalian  hear  .The heart valves are modified  in  order to  minimize  the  fraction  that occur as a result of  high  blood  pressure  and  pulse  rate  of  the  duck  heart , also  the  muscular  trabeculae   replace  the  chordate  tendineae  , which  were  present in the  mammalian    heart  in order to  minimize  the  fraction  resulting  from high  pulse  rate..    


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wen Wang ◽  
Hongwei Cai ◽  
Huiping Ding ◽  
Xiaoping Xu

Abstract Background Trigeminal-cardiac reflex (TCR) is a brainstem vagus reflex that occurs when any center or peripheral branch of the trigeminal nerve was stimulated or operated on. The typical clinical manifestation is sudden bradycardia with or without blood pressure decline. The rhino-cardiac reflex which is one type of TCR is rare in clinical practice. As the rhino-cardiac reflex caused by disinfection of the nasal cavity is very rare, we report these two cases to remind other anesthesiologists to be vigilant to this situation. Case presentation This case report describes two cases of cardiac arrest caused by rhino-cardiac reflex while disinfecting nasal cavity before endoscopic transsphenoidal removal of pituitary adenomas. Their heart rate all dropped suddenly at the very moment of nasal stimulation and recovered quickly after stimulation was stopped and the administration of drugs or cardiac support. Conclusion Although the occurrence of rhino-cardiac reflex is rare, we should pay attention to it in clinical anesthesia. It is necessary to know the risk factors for preventing it. Once it occurs, we should take active and effective rescue measures to avoid serious complications.


PEDIATRICS ◽  
1949 ◽  
Vol 3 (2) ◽  
pp. 201-207
Author(s):  
JAMES G. HUGHES ◽  
HERMAN ROSENBLUM ◽  
LACY G. HORN

A case of Wilms' tumor of the right kidney is presented, in which the dominant clinical features were extreme elevation of blood pressure and hypertensive encephalopathy, associated with cardiac decompensation and death. Generalized convulsions and right hemiplegia developed, believed to have been due to cerebral anoxia incident to angiospasm. No metastases were found, and no other cause for arterial hypertension was discovered. This patient is thought to be the first case reported where death from Wilms' tumor was due to the hypertensive factor. The literature with reference to the association of hypertension with Wilms' tumor is reviewed. The mechanisms by which Wilms' tumors may produce unilateral renal ischemia with arterial hypertension are discussed. The presence of clearcut hypertension in a child with a kidney area mass points toward the probability of a Wilms' tumor.


PEDIATRICS ◽  
1989 ◽  
Vol 83 (2) ◽  
pp. 240-243
Author(s):  
Myung K. Park ◽  
Da-Hae Lee

Indirect BP measurement was obtained in the right upper arm in 219 healthy newborn infants with the Dinamap monitor and was compared with values obtained from the calf to establish normative BP values and to help establish a diagnosis of hypertension and coarctation of the aorta in the newborn. There were 174 Mexican-Americans (79.5%), 33 whites (15.0%), and 12 blacks (5.5%). The width of the BP cuff was selected to be 0.4 to 0.5 times the circumference of the extremities. Three supine position readings of BPs and heart rate were obtained from each site and were averaged for statistical analyses. Mean arm BP values (±SD) of the neonate less than 36 hours of age were 62.6±6.9/38.9± 5.7 mm Hg (48.0±6.2 mm Hg). Neonates older than 36 hours had slightly but significantly (P<.05) greater values (4 to 6 mm Hg) than did infants younger than 36 hours of age. Active neonates had values 6 to 10 mm Hg greater than quiet neonates (P<.05). BP values in the calf obtained with the same-sized cuff were almost identical with those obtained from the arm. Differences in consecutively obtained arm and calf BPs (arm values minus calf values) were 1.1±7.7 mm Hg systolic, -0.01 ± 6.2 mm Hg diastolic, and 0.9 ±6.9 mm Hg mean pressures. Mean heart rate (±SD) of neonates less than 36 hours of age was 129.4± 13.2 beats per minute and that of neonates older than 36 hours of age was 139.4± 14.1 beats per minute. These results show the following: (1) arm BPs and calf BPs using the same-sized cuff are almost identical with mean values of approximately 65/ 41 mm Hg (50 mm Hg) in neonates one to three days of age, (2) arm BP of 75/49 mm Hg (59 mm Hg) or greater is in the hypertensive range, and (3) calf BPs that are less than arm BPs by mean + 1 SD (6 to 9 mm Hg) necessitate a thorough investigation for coarctation of the aorta.


1993 ◽  
Vol 75 (2) ◽  
pp. 663-667 ◽  
Author(s):  
M. Saito ◽  
A. Tsukanaka ◽  
D. Yanagihara ◽  
T. Mano

The aim of this study was to clarify the relationship between sympathetic outflow to skeletal muscle and oxygen uptake during dynamic exercise. Muscle sympathetic nerve activity (MSNA) was recorded from the right median nerve microneurographically in eight healthy volunteers during leg cycling at four different intensities in a seated position for a 16-min bout. Work loads selected were 20, 40, 60, and 75% of maximal oxygen uptake (VO2max). Heart rate and blood pressure were measured during each exercise test. MSNA burst frequency was suppressed by 28% during cycling at 20% VO2max (23 vs. 33 bursts/min for control). Thereafter, it increased in a linear fashion with increasing work rate, with a significantly higher burst frequency during 60% VO2max than the control value. Both heart rate and mean blood pressure rose significantly during 20% VO2max from the control value and increased linearly with increased exercise intensity. During light exercise, MSNA was suppressed by arterial and cardiopulmonary baroreceptors as a result of the hemodynamic changes associated with leg muscle pumping. The baroreflex inhibition may overcome the muscle metaboreflex excitation to induce MSNA suppression during light exercise. These results suggest that during light exercise MSNA is inhibited, perhaps due to loading of the cardiopulmonary and arterial baroreflexes, and that during heavier exercise the increase in MSNA occurs as muscle metaboreflexes are activated.


1992 ◽  
Vol 72 (3) ◽  
pp. 1039-1043 ◽  
Author(s):  
V. K. Somers ◽  
K. C. Leo ◽  
R. Shields ◽  
M. Clary ◽  
A. L. Mark

Recent evidence indicates that muscle ischemia and activation of the muscle chemoreflex are the principal stimuli to sympathetic nerve activity (SNA) during isometric exercise. We postulated that physical training would decrease muscle chemoreflex stimulation during isometric exercise and thereby attenuate the SNA response to exercise. We investigated the effects of 6 wk of unilateral handgrip endurance training on the responses to isometric handgrip (IHG: 33% of maximal voluntary contraction maintained for 2 min). In eight normal subjects the right arm underwent exercise training and the left arm sham training. We measured muscle SNA (peroneal nerve), heart rate, and blood pressure during IHG before vs. after endurance training (right arm) and sham training (left arm). Maximum work to fatigue (an index of training efficacy) was increased by 1,146% in the endurance-trained arm and by only 40% in the sham-trained arm. During isometric exercise of the right arm, SNA increased by 111 +/- 27% (SE) before training and by only 38 +/- 9% after training (P less than 0.05). Endurance training did not significantly affect the heart rate and blood pressure responses to IHG. We also measured the SNA response to 2 min of forearm ischemia after IHG in five subjects. Endurance training also attenuated the SNA response to postexercise forearm ischemia (P = 0.057). Sham training did not significantly affect the SNA responses to IHG or forearm ischemia. We conclude that endurance training decreases muscle chemoreflex stimulation during isometric exercise and thereby attenuates the sympathetic nerve response to IHG.


2019 ◽  
Vol 90 (e7) ◽  
pp. A33.1-A33
Author(s):  
Chris Blair ◽  
Kartik Bhatia ◽  
David Brunacci ◽  
John Worthington ◽  
Rebekah Ahmed

IntroductionWith approximately 200 procedures performed in the last year at our centre, worthwhile clinical lessons continue to emerge in the practice of endovascular clot retrieval (ECR) for acute stroke. This case demonstrates the value of considered clinical appraisal in a dynamic, information-rich setting. A 68 year-old man with established vertebrobasilar atherosclerotic disease developed capricious, blood pressure-sensitive neurological deficits after successful ECR for a basilar artery stroke, inviting the possibility of further intervention in the form of intracranial stenting. We avoided pursuing this course of action in favour of a more measured approach, entailing the provision of vasopressor support over the following week.MethodFollowing ECR, our patient was admitted to the intensive care unit for continuous blood pressure monitoring and close observation of his neurological deficits with serial NIHSS (National Institutes of Health Stroke Scale) scoring. Systolic blood pressures were maintained between 140–160 mmHg using vasopressor support, with the aim of allowing time for recovery of vascular autoregulation and collateralization.ResultsOver six days, the patient developed moderate left upper and lower limb weakness. An MRI performed on Day 5 revealed limited interval infarction of the right hemipons and cerebellum, with complete re-occlusion of the mid-basilar arterial segment. He left the ICU with a NIHSS score of 7, and was living independently at 90-day follow-up (Modified Rankin Score 1).ConclusionThe ultimately favourable net outcome for our patient clearly illustrates the imperative to remain within the boundaries of evidence-based practice in this bold and rapidly evolving discipline.


Resuscitation ◽  
2018 ◽  
Vol 130 ◽  
pp. 167-173 ◽  
Author(s):  
Filippo Annoni ◽  
Antonio Maria Dell’Anna ◽  
Federico Franchi ◽  
Jacques Creteur ◽  
Sabino Scolletta ◽  
...  

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