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Items: 1 to 50 of 116

1.

When Sinus Tachycardia Becomes Too Much: Negative Effects of Excessive Upright Tachycardia on Cardiac Output in Vasovagal Syncope, Postural Tachycardia Syndrome, and Inappropriate Sinus Tachycardia.

Stewart JM, Medow MS, Visintainer P, Sutton R.

Circ Arrhythm Electrophysiol. 2020 Jan 15. doi: 10.1161/CIRCEP.119.007744. [Epub ahead of print]

PMID:
31941353
2.

Initial Orthostatic Hypotension Causes (Transient) Postural Tachycardia.

Stewart JM, Javaid S, Fialkoff T, Tuma-Marcella B, Visintainer P, Terilli C, Medow MS.

J Am Coll Cardiol. 2019 Sep 3;74(9):1271-1273. doi: 10.1016/j.jacc.2019.06.054. No abstract available.

PMID:
31466625
3.

The Benefits of Oral Rehydration on Orthostatic Intolerance in Children with Postural Tachycardia Syndrome.

Medow MS, Guber K, Chokshi S, Terilli C, Visintainer P, Stewart JM.

J Pediatr. 2019 Nov;214:96-102. doi: 10.1016/j.jpeds.2019.07.041. Epub 2019 Aug 9.

PMID:
31405524
4.

Mechanisms of tilt-induced vasovagal syncope in healthy volunteers and postural tachycardia syndrome patients without past history of syncope.

Stewart JM, Shaban MA, Fialkoff T, Tuma-Marcella B, Visintainer P, Terilli C, Medow MS.

Physiol Rep. 2019 Aug;7(13):e14148. doi: 10.14814/phy2.14148.

5.

Hemodynamic characteristics of postural hyperventilation: POTS with hyperventilation versus panic versus voluntary hyperventilation.

Stewart JM, Pianosi P, Shaban MA, Terilli C, Svistunova M, Visintainer P, Medow MS.

J Appl Physiol (1985). 2018 Nov 1;125(5):1396-1403. doi: 10.1152/japplphysiol.00377.2018. Epub 2018 Aug 23.

6.

Postural Hyperventilation as a Cause of Postural Tachycardia Syndrome: Increased Systemic Vascular Resistance and Decreased Cardiac Output When Upright in All Postural Tachycardia Syndrome Variants.

Stewart JM, Pianosi P, Shaban MA, Terilli C, Svistunova M, Visintainer P, Medow MS.

J Am Heart Assoc. 2018 Jun 30;7(13). pii: e008854. doi: 10.1161/JAHA.118.008854.

7.

Pediatric Disorders of Orthostatic Intolerance.

Stewart JM, Boris JR, Chelimsky G, Fischer PR, Fortunato JE, Grubb BP, Heyer GL, Jarjour IT, Medow MS, Numan MT, Pianosi PT, Singer W, Tarbell S, Chelimsky TC; Pediatric Writing Group of the American Autonomic Society.

Pediatrics. 2018 Jan;141(1). pii: e20171673. doi: 10.1542/peds.2017-1673. Epub 2017 Dec 8. Review.

8.

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Diagnosis and Management in Young People: A Primer.

Rowe PC, Underhill RA, Friedman KJ, Gurwitt A, Medow MS, Schwartz MS, Speight N, Stewart JM, Vallings R, Rowe KS.

Front Pediatr. 2017 Jun 19;5:121. doi: 10.3389/fped.2017.00121. eCollection 2017. Review.

9.

Decreasing cerebral oxygen consumption during upright tilt in vasovagal syncope.

Medow MS, Kothari ML, Goetz AM, O'Donnell-Smith MB, Terilli C, Stewart JM.

Physiol Rep. 2017 May;5(10):e13286. doi: 10.14814/phy2.13286.

10.

Nitric oxide synthase inhibition restores orthostatic tolerance in young vasovagal syncope patients.

Stewart JM, Sutton R, Kothari ML, Goetz AM, Visintainer P, Medow MS.

Heart. 2017 Nov;103(21):1711-1718. doi: 10.1136/heartjnl-2017-311161. Epub 2017 May 13.

11.

Postural Heart Rate Changes in Young Patients With Vasovagal Syncope.

Medow MS, Merchant S, Suggs M, Terilli C, O'Donnell-Smith B, Stewart JM.

Pediatrics. 2017 Apr;139(4). pii: e20163189. doi: 10.1542/peds.2016-3189.

12.

Oscillatory lower body negative pressure impairs working memory task-related functional hyperemia in healthy volunteers.

Merchant S, Medow MS, Visintainer P, Terilli C, Stewart JM.

Am J Physiol Heart Circ Physiol. 2017 Apr 1;312(4):H672-H680. doi: 10.1152/ajpheart.00438.2016. Epub 2017 Feb 3.

13.

Mechanisms of Vasovagal Syncope in the Young: Reduced Systemic Vascular Resistance Versus Reduced Cardiac Output.

Stewart JM, Medow MS, Sutton R, Visintainer P, Jardine DL, Wieling W.

J Am Heart Assoc. 2017 Jan 18;6(1). pii: e004417. doi: 10.1161/JAHA.116.004417.

14.

Bioimpedance monitoring of cellular hydration during hemodialysis therapy.

Montgomery LD, Montgomery RW, Gerth WA, Lew SQ, Klein MD, Stewart JM, Medow MS, Velasquez MT.

Hemodial Int. 2017 Oct;21(4):575-584. doi: 10.1111/hdi.12511. Epub 2016 Nov 8.

PMID:
27860119
15.

Postsynaptic α1-Adrenergic Vasoconstriction Is Impaired in Young Patients With Vasovagal Syncope and Is Corrected by Nitric Oxide Synthase Inhibition.

Stewart JM, Suggs M, Merchant S, Sutton R, Terilli C, Visintainer P, Medow MS.

Circ Arrhythm Electrophysiol. 2016 Aug;9(8). pii: e003828. doi: 10.1161/CIRCEP.115.003828.

16.

Oscillatory lower body negative pressure impairs task related functional hyperemia in healthy volunteers.

Stewart JM, Balakrishnan K, Visintainer P, Del Pozzi AT, Messer ZR, Terilli C, Medow MS.

Am J Physiol Heart Circ Physiol. 2016 Mar 15;310(6):H775-84. doi: 10.1152/ajpheart.00747.2015. Epub 2016 Jan 22.

17.

Treatment of Sandifer Syndrome with an Amino-Acid-Based Formula.

Bamji N, Berezin S, Bostwick H, Medow MS.

AJP Rep. 2015 Apr;5(1):e51-2. doi: 10.1055/s-0035-1545672. Epub 2015 Mar 4.

18.

Oscillatory cerebral blood flow is associated with impaired neurocognition and functional hyperemia in postural tachycardia syndrome during graded tilt.

Stewart JM, Del Pozzi AT, Pandey A, Messer ZR, Terilli C, Medow MS.

Hypertension. 2015 Mar;65(3):636-43. doi: 10.1161/HYPERTENSIONAHA.114.04576. Epub 2014 Dec 15.

19.

Phenylephrine alteration of cerebral blood flow during orthostasis: effect on n-back performance in chronic fatigue syndrome.

Medow MS, Sood S, Messer Z, Dzogbeta S, Terilli C, Stewart JM.

J Appl Physiol (1985). 2014 Nov 15;117(10):1157-64. doi: 10.1152/japplphysiol.00527.2014. Epub 2014 Oct 2.

20.

Altered oscillatory cerebral blood flow velocity and autoregulation in postural tachycardia syndrome.

Medow MS, Del Pozzi AT, Messer ZR, Terilli C, Stewart JM.

Front Physiol. 2014 Jun 23;5:234. doi: 10.3389/fphys.2014.00234. eCollection 2014.

21.

Blunted cerebral blood flow velocity in response to a nitric oxide donor in postural tachycardia syndrome.

Del Pozzi AT, Pandey A, Medow MS, Messer ZR, Stewart JM.

Am J Physiol Heart Circ Physiol. 2014 Aug 1;307(3):H397-404. doi: 10.1152/ajpheart.00194.2014. Epub 2014 May 30.

22.

Reduced cerebral blood flow with orthostasis precedes hypocapnic hyperpnea, sympathetic activation, and postural tachycardia syndrome.

Del Pozzi AT, Schwartz CE, Tewari D, Medow MS, Stewart JM.

Hypertension. 2014 Jun;63(6):1302-8. doi: 10.1161/HYPERTENSIONAHA.113.02824. Epub 2014 Apr 7.

23.

What is brain fog? An evaluation of the symptom in postural tachycardia syndrome.

Ross AJ, Medow MS, Rowe PC, Stewart JM.

Clin Auton Res. 2013 Dec;23(6):305-11. doi: 10.1007/s10286-013-0212-z. Epub 2013 Sep 3.

24.
25.

Disruption of phase synchronization between blood pressure and muscle sympathetic nerve activity in postural vasovagal syncope.

Schwartz CE, Lambert E, Medow MS, Stewart JM.

Am J Physiol Heart Circ Physiol. 2013 Oct 15;305(8):H1238-45. doi: 10.1152/ajpheart.00415.2013. Epub 2013 Aug 9.

26.

Spontaneous fluctuation indices of the cardiovagal baroreflex accurately measure the baroreflex sensitivity at the operating point during upright tilt.

Schwartz CE, Medow MS, Messer Z, Stewart JM.

Am J Physiol Regul Integr Comp Physiol. 2013 Jun 15;304(12):R1107-13. doi: 10.1152/ajpregu.00559.2012. Epub 2013 Apr 10.

27.

Middle cerebral O₂ delivery during the modified Oxford maneuver increases with sodium nitroprusside and decreases during phenylephrine.

Stewart JM, Medow MS, DelPozzi A, Messer ZR, Terilli C, Schwartz CE.

Am J Physiol Heart Circ Physiol. 2013 Jun 1;304(11):H1576-83. doi: 10.1152/ajpheart.00114.2013. Epub 2013 Apr 5.

28.

Monitoring intracellular, interstitial, and intravascular volume changes during fluid management procedures.

Montgomery LD, Gerth WA, Montgomery RW, Lew SQ, Klein MM, Stewart JM, Medow MS, Velasquez MT.

Med Biol Eng Comput. 2013 Oct;51(10):1167-75. doi: 10.1007/s11517-013-1064-3. Epub 2013 Apr 3. Erratum in: Med Biol Eng Comput. 2013 Oct;51(10):1177. Medow, Marvin S [added].

29.

Modulation of the axon-reflex response to local heat by reactive oxygen species in subjects with chronic fatigue syndrome.

Medow MS, Aggarwal A, Baugham I, Messer Z, Stewart JM.

J Appl Physiol (1985). 2013 Jan 1;114(1):45-51. doi: 10.1152/japplphysiol.00821.2012. Epub 2012 Nov 8.

30.

Increased ventricular lactate in chronic fatigue syndrome. III. Relationships to cortical glutathione and clinical symptoms implicate oxidative stress in disorder pathophysiology.

Shungu DC, Weiduschat N, Murrough JW, Mao X, Pillemer S, Dyke JP, Medow MS, Natelson BH, Stewart JM, Mathew SJ.

NMR Biomed. 2012 Sep;25(9):1073-87. doi: 10.1002/nbm.2772. Epub 2012 Jan 27.

31.

Postural neurocognitive and neuronal activated cerebral blood flow deficits in young chronic fatigue syndrome patients with postural tachycardia syndrome.

Stewart JM, Medow MS, Messer ZR, Baugham IL, Terilli C, Ocon AJ.

Am J Physiol Heart Circ Physiol. 2012 Mar 1;302(5):H1185-94. doi: 10.1152/ajpheart.00994.2011. Epub 2011 Dec 16.

32.

Increasing orthostatic stress impairs neurocognitive functioning in chronic fatigue syndrome with postural tachycardia syndrome.

Ocon AJ, Messer ZR, Medow MS, Stewart JM.

Clin Sci (Lond). 2012 Mar;122(5):227-38. doi: 10.1042/CS20110241.

33.

Cutaneous constitutive nitric oxide synthase activation in postural tachycardia syndrome with splanchnic hyperemia.

Stewart JM, Nafday A, Ocon AJ, Terilli C, Medow MS.

Am J Physiol Heart Circ Physiol. 2011 Sep;301(3):H704-11. doi: 10.1152/ajpheart.00171.2011. Epub 2011 Jun 3.

34.

Ascorbate improves circulation in postural tachycardia syndrome.

Stewart JM, Ocon AJ, Medow MS.

Am J Physiol Heart Circ Physiol. 2011 Sep;301(3):H1033-42. doi: 10.1152/ajpheart.00018.2011. Epub 2011 May 27.

35.

Increased pulsatile cerebral blood flow, cerebral vasodilation, and postsyncopal headache in adolescents.

Ocon AJ, Messer Z, Medow MS, Stewart JM.

J Pediatr. 2011 Oct;159(4):656-62.e1. doi: 10.1016/j.jpeds.2011.04.006. Epub 2011 May 19.

36.

Baroreceptor unloading in postural tachycardia syndrome augments peripheral chemoreceptor sensitivity and decreases central chemoreceptor sensitivity.

Taneja I, Medow MS, Clarke DA, Ocon AJ, Stewart JM.

Am J Physiol Heart Circ Physiol. 2011 Jul;301(1):H173-9. doi: 10.1152/ajpheart.01211.2010. Epub 2011 May 2.

37.

Reactive oxygen species (ROS) from NADPH and xanthine oxidase modulate the cutaneous local heating response in healthy humans.

Medow MS, Bamji N, Clarke D, Ocon AJ, Stewart JM.

J Appl Physiol (1985). 2011 Jul;111(1):20-6. doi: 10.1152/japplphysiol.01448.2010. Epub 2011 Mar 24.

38.

Ventilatory baroreflex sensitivity in humans is not modulated by chemoreflex activation.

Stewart JM, Rivera E, Clarke DA, Baugham IL, Ocon AJ, Taneja I, Terilli C, Medow MS.

Am J Physiol Heart Circ Physiol. 2011 Apr;300(4):H1492-500. doi: 10.1152/ajpheart.01217.2010. Epub 2011 Feb 11.

39.

Respiration drives phase synchronization between blood pressure and RR interval following loss of cardiovagal baroreflex during vasovagal syncope.

Ocon AJ, Medow MS, Taneja I, Stewart JM.

Am J Physiol Heart Circ Physiol. 2011 Feb;300(2):H527-40. doi: 10.1152/ajpheart.00257.2010. Epub 2010 Nov 12.

40.

Postural tachycardia syndrome from a pediatrics perspective.

Medow MS.

J Pediatr. 2011 Jan;158(1):4-6. doi: 10.1016/j.jpeds.2010.08.038. Epub 2010 Sep 27. No abstract available.

PMID:
20870247
41.

Anorectal motility abnormalities in children with encopresis and chronic constipation.

Raghunath N, Glassman MS, Halata MS, Berezin SH, Stewart JM, Medow MS.

J Pediatr. 2011 Feb;158(2):293-6. doi: 10.1016/j.jpeds.2010.07.063. Epub 2010 Sep 17.

PMID:
20850765
42.

Initial orthostatic hypotension in the young is attenuated by static handgrip.

Clarke DA, Medow MS, Taneja I, Ocon AJ, Stewart JM.

J Pediatr. 2010 Jun;156(6):1019-1022.e1. doi: 10.1016/j.jpeds.2010.01.035. Epub 2010 Mar 28.

43.

Postural change alters autonomic responses to breath-holding.

Taneja I, Medow MS, Clarke DA, Ocon AJ, Stewart JM.

Clin Auton Res. 2010 Apr;20(2):65-72. doi: 10.1007/s10286-009-0046-x. Epub 2009 Dec 11.

44.

Increased phase synchronization and decreased cerebral autoregulation during fainting in the young.

Ocon AJ, Kulesa J, Clarke D, Taneja I, Medow MS, Stewart JM.

Am J Physiol Heart Circ Physiol. 2009 Dec;297(6):H2084-95. doi: 10.1152/ajpheart.00705.2009. Epub 2009 Oct 9.

45.

Decreased upright cerebral blood flow and cerebral autoregulation in normocapnic postural tachycardia syndrome.

Ocon AJ, Medow MS, Taneja I, Clarke D, Stewart JM.

Am J Physiol Heart Circ Physiol. 2009 Aug;297(2):H664-73. doi: 10.1152/ajpheart.00138.2009. Epub 2009 Jun 5.

46.

Defects in cutaneous angiotensin-converting enzyme 2 and angiotensin-(1-7) production in postural tachycardia syndrome.

Stewart JM, Ocon AJ, Clarke D, Taneja I, Medow MS.

Hypertension. 2009 May;53(5):767-74. doi: 10.1161/HYPERTENSIONAHA.108.127357. Epub 2009 Mar 16.

47.

Multiresolution wavelet analysis of time-dependent physiological responses in syncopal youths.

Nowak JA, Ocon A, Taneja I, Medow MS, Stewart JM.

Am J Physiol Heart Circ Physiol. 2009 Jan;296(1):H171-9. doi: 10.1152/ajpheart.00963.2008. Epub 2008 Nov 7.

48.

Fructose intolerance in children presenting with abdominal pain.

Gomara RE, Halata MS, Newman LJ, Bostwick HE, Berezin SH, Cukaj L, See MC, Medow MS.

J Pediatr Gastroenterol Nutr. 2008 Sep;47(3):303-8. doi: 10.1097/MPG.0b013e318166cbe4.

PMID:
18728526
49.

Nitric oxide and prostaglandin inhibition during acetylcholine-mediated cutaneous vasodilation in humans.

Medow MS, Glover JL, Stewart JM.

Microcirculation. 2008 Aug;15(6):569-79. doi: 10.1080/10739680802091526.

50.

Increased vasoconstriction predisposes to hyperpnea and postural faint.

Taneja I, Medow MS, Glover JL, Raghunath NK, Stewart JM.

Am J Physiol Heart Circ Physiol. 2008 Jul;295(1):H372-81. doi: 10.1152/ajpheart.00101.2008. Epub 2008 May 23.

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