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Rosenthal E, Bostock J, Gill J. Iatrogenic atrioventricular bypass tract following a Fontan operation for tricuspid atresia. HEART (BRITISH CARDIAC SOCIETY) 1997; 77:283-5. [PMID: 9093052 PMCID: PMC484700 DOI: 10.1136/hrt.77.3.283] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A 16 year old female with tricuspid atresia had undergone a Fontan operation at four years of age. Two years later she first presented with a narrow complex tachycardia which could only be partially controlled on flecainide in high doses. On electrophysiological study, the tachycardia was found to be due to atrioventricular re-entry within the surgical right atrial to right ventricular outflow tract anastomosis. Radiofrequency ablation at this site abolished the arrhythmia and she is now symptom-free on no medication.
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Abstract
Dual sensor ventricular demand rate responsive (VVIR mode) pacing was compared with single sensor rate responsive pacing to assess whether this new development should be more widely incorporated in modern pacemaker devices. A within patient randomized, double-blind crossover study involving ten patients, mean age 67.4 years (70% male), had Medtronic Legend Plus dual sensor VVIR pacemakers implanted for high grade AV block and chronic or persistent paroxysmal atrial fibrillation. Performance values were compared to 20 healthy control subjects of a similar age and gender. Patients were both subjectively and objectively assessed after 2 weeks of out-of-hospital activity in VVIR mode (minute ventilation sensing), VVIR mode (activity sensing), VVIR mode (dual sensor), and VVI mode (no rate response). All patients were assessed for subjective preference for, and objective improvement in, any pacing modality as assessed by standardized daily activity protocols and graded exercise treadmill testing. Subjective perception of exercise capacity and functional status was significantly lower in VVI mode (P < 0.05) compared to any of the VVIR modes, which did not differ. After completion of the study 70% of patients chose VVIR as their preferred mode, with 30% expressing no preference. Forty percent preferred activity sensor VVIR mode pacing, 30% preferred dual sensor VVIR mode pacing, and 70% found either dual sensor VVIR mode, minute ventilation sensor VVIR mode, or both modalities least acceptable. No patient found activity sensing VVIR mode least acceptable. Graded treadmill testing revealed significantly lower exercise tolerance during VVI mode pacing (P < 0.01) compared to the VVIR modalities, which did not differ. Overall, chronotropic response was best with dual sensor pacing during standardized daily activity protocols and during the standard car journey. The data from this study suggest that there is no marked clinical advantage obtained from the use of dual sensor devices over current activity sensing ventricular demand rate responsive pacemakers, but with the probable added disadvantages of increased size, complexity, cost, and decreased longevity.
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103
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Bostock J, Marsen M, Sarwar Z, Stoltz S. Postnatal depression in Asian women. COMMUNITY NURSE 1996; 2:34-6. [PMID: 9450461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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104
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Sulke N, Tan K, Bostock J. Pacemaker upgrade for recurrent pacemaker syndrome using a redundant contralateral electrode in a patient with bilateral venous stenoses. Pacing Clin Electrophysiol 1996; 19:1134-5. [PMID: 8823846 DOI: 10.1111/j.1540-8159.1996.tb03427.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Following His-bundle ablation and VVIR pacemaker implantation, severe Pacemaker syndrome developed and was treated with DDDR pacing in a 70-year-old woman. Due to bilateral subclavian vein stenosis, DDDR pacing could not be maintained and an unusual method of restoring atrioventricular synchrony is described using the contralateral redundant atrial electrode connected to the ipsilateral dual chamber pacemaker and ventricular electrode.
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105
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Sulke N, Tan K, Bostock J. Pacemaker upgrade for recurrent pacemaker syndrome using a redundant contralateral electrode in a patient with bilateral venous stenoses. Pacing Clin Electrophysiol 1996; 19:378-9. [PMID: 8657604 DOI: 10.1111/j.1540-8159.1996.tb03345.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Following His-bundle ablation and VVIR pacemaker implantation, severe pacemaker syndrome developed and was treated with DDDR pacing, in a 70-year-old woman. Due to bilateral subclavian vein stenoses, DDDR pacing could not be maintained and an unusual method of restoring atrioventricular synchrony is described using the contralateral redundant atrial electrode connected to the ipsilateral dual chamber pacemaker and ventricular electrode.
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106
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Sulke N, Dritsas A, Bostock J, Wells A, Morris R, Sowton E. "Subclinical" pacemaker syndrome: a randomised study of symptom free patients with ventricular demand (VVI) pacemakers upgraded to dual chamber devices. Heart 1992; 67:57-64. [PMID: 1739528 PMCID: PMC1024703 DOI: 10.1136/hrt.67.1.57] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE To determine whether symptom free patients with single chamber pacemakers benefit from dual chamber pacing. DESIGN A randomised double blind crossover comparison of ventricular demand (VVI), dual chamber demand (DDI), and dual chamber universal (DDD) modes after upgrading from a VVI device. SETTING Cardiology outpatient department. PATIENTS Sixteen patients aged 41-84 years who were symptom free during VVI mode pacing for three or more years. INTERVENTION Pacemaker upgrade during routine generator change. MAIN OUTCOME MEASURES Change in subjective (general health perception, symptoms) and objective (clinical assessment, treadmill exercise, and radiological and echocardiographic indices) results between pacing modes before and after upgrading. RESULTS 75% preferred DDD, 68% found VVI least acceptable with 12% expressing no preference. Perceived general well-being and exercise capacity (p less than 0.01) and treadmill times (p less than 0.05) were improved in DDD mode but VVI and DDI modes were similar. Clinical, echocardiographic, radiological, and electrophysiological indices confirmed the absence of overt pacemaker syndrome, although mitral and tricuspid regurgitation was greatest in VVI mode (p less than 0.01). CONCLUSIONS Most patients who were satisfied with long term pacing in VVI mode benefited from upgrading to DDD mode pacing suggesting the existence of "subclinical" pacemaker syndrome in up to 75% of such patients. The DDI mode offered little subjective or objective benefit over VVI mode in this population and should be reserved for patients with paroxysmal atrial arrhythmias. VVI mode pacing should be used only for patients with very intermittent symptomatic bradycardia or atrial fibrillation with a good chronotropic response during exercise.
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107
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Amso NN, Bostock J, Burwood R, Shaw RW. Pelvic ultrasonography in the initial investigation of subfertile women. J OBSTET GYNAECOL 1991. [DOI: 10.3109/01443619109013508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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108
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Sulke N, Holt P, Bostock J, Yates A, Sowton E. Inappropriate discharges by the implantable cardioverter defibrillator during postoperative testing: implications for intraoperative assessment. Pacing Clin Electrophysiol 1990; 13:1123-6. [PMID: 1700387 DOI: 10.1111/j.1540-8159.1990.tb02169.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Inappropriate shocks were delivered to a patient while in sinus rhythm by an implantable cardioverter defibrillator (ICD) during routine prehospital discharge testing. This was induced by the standard programmer when the "read" telemetry sequence was initiated. The ICD was removed and found to suffer from electrical artifact that was sensed as ventricular tachycardia during telemetry. To avoid inadvertent telemetry-induced shocks during routine testing, all ICDs should be interrogated, using a standard programmer, intraoperatively, with the unit in "defibrillation on" mode.
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109
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Alexopoulos D, Yusuf S, Bostock J, Johnston JA, Sleight P, Yacoub MH. Ventricular arrhythmias in long term survivors of orthotopic and heterotopic cardiac transplantation. Heart 1988; 59:648-52. [PMID: 3293640 PMCID: PMC1276869 DOI: 10.1136/hrt.59.6.648] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Fourteen long term survivors with orthotopic (recipient heart replaced by donor heart) and nine with heterotopic cardiac transplants (recipient heart retained) had 24 hour ambulatory electrocardiographic monitoring to detect ventricular arrhythmias. Arrhythmia was uncommon in the patients with orthotopic transplants; none of them had more than one extrasystole per hour. In the patients with heterotopic cardiac transplants the recipient's own heart showed significantly more frequent ventricular arrhythmias than the corresponding donor heart: abnormal complexes (mean/24 h) 4583 vs 42.7; extrasystoles 1772 vs 17.8; pairs 121 vs 0.8. There was no relation between the abnormal ventricular activity of the two hearts in the patients with heterotopic transplants on a beat by beat, hourly, or 24 hour basis. There was no consistent diurnal variation in the frequency of the abnormal ventricular beats after cardiac transplantation. The occurrence of ventricular arrhythmia was unrelated to the interval from operation to the study. In long term survivors of cardiac transplantation the denervated heart shows a little ventricular ectopic activity even when compared with normal hearts. In patients with heterotopic transplants ventricular arrhythmias commonly occur in the recipient's own heart; these are probably related to the underlying severity of the original disease.
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110
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Alexopoulos D, Yusuf S, Johnston JA, Bostock J, Sleight P, Yacoub MH. The 24-hour heart rate behavior in long-term survivors of cardiac transplantation. Am J Cardiol 1988; 61:880-4. [PMID: 3281427 DOI: 10.1016/0002-9149(88)90363-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A detailed computerized analysis of heart rate (HR) behavior during ambulatory monitoring was performed in 19 long-term survivors of cardiac transplantation (12 orthotopic, 7 heterotopic) and in 10 normal volunteers. Compared with normal hearts, the transplanted denervated and the recipient innervated hearts in the heterotopic group showed higher average HRs over the whole 24 hours, the waking and sleeping periods. The rates of the denervated and the recipient hearts did not differ significantly. The maximal HR was similar in all 3 groups, but the minimal HR was lower in the normal hearts than in denervated and recipient hearts. The 24-hour RR interval variability was greatly reduced in the denervated hearts (60 +/- 22 ms) compared with the recipient (89 +/- 26 ms) and normal (151 +/- 38 ms) hearts. During arousal from sleep, the magnitude, time and rate of the HR change were significantly reduced in the denervated hearts compared with the innervated hearts and in the recipient compared with the normal hearts. These findings demonstrate that denervated hearts can show significant variations in HR during the 24-hour period, but to a lesser extent than normal hearts. The widest deviation from normal occurs during sleep, when the denervated heart shows minimal slowing probably due to lack of parasympathetic innervation. In heterotopic transplant recipients, the patients' own HR responses also are significantly blunted.
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111
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House A, Bostock J, Cooper J. Depressive syndromes in the year following onset of a first schizophrenic illness*. Br J Psychiatry 1987; 151:773-9. [PMID: 2901885 DOI: 10.1192/bjp.151.6.773] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A complete, unselected series of 68 patients who were seen during their first episode of an undoubtedly schizophrenic illness, and followed up one year later (for 56 patients) is described clinically. Depressive symptoms were common at onset, and 22% of patients could have been considered cases of depression from these symptoms alone. At follow-up, depressive symptoms had reduced in prevalence and only 7% of subjects were depressed cases. Only two cases of depression at follow-up had not been cases at onset. These changes could not be attributed to the use of antidepressants or ECT. Depressive syndromes could be distinguished from akinesia and the negative syndromes. The findings indicate that depression cannot be attributed solely to the administration of neuroleptics.
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112
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Arensman FW, Bostock J, Radley-Smith R, Yacoub MH. Cardiac rhythm and conduction before and after anatomic correction of transposition of the great arteries. Am J Cardiol 1983; 52:836-9. [PMID: 6624674 DOI: 10.1016/0002-9149(83)90424-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
To assess pre- and postoperative arrhythmias associated with anatomic correction of transposition of the great arteries, 34 patients had 145 standard electrocardiograms (ECGs) and 24 of these patients had 46 24-hour ECGs from 11 months before to 54 months after anatomic repair. Twenty-two patients underwent balloon atrial septostomy and 7 surgical atrial septectomy before the initial 24-hour ECG. Anatomic correction included repair of a large ventricular septal defect in 16 patients and an aortopulmonary window in 1 patient. The preoperative standard ECG showed sinus rhythm in every patient. Preoperative 24-hour tapes revealed sinus arrhythmias in 2, sinus bradycardia at a rate of less than or equal to 50 beats/min in 1, junctional rhythm in 1 and rare premature ventricular contractions (PVCs) in 1. The postoperative 24-hour ECG showed atrioventricular dissociation in 1 patient, rare premature atrial contractions in 7, rare PVCs in 8 and sinus bradycardia with junctional escape in 1. Eight patients had PVCs on the postoperative ECG that were not noted on preoperative tapes. No patient had prolonged bradycardia (less than or equal to 50 beats/min), life-threatening arrhythmias or sudden death. Except for 1 patient with atrioventricular dissociation believed to be secondary to a preventable cause, 34 patients followed for 890 patient-months after anatomic correction for transposition of the great arteries had no significant arrhythmias.
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113
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Lieberman B, Bostock J. Letter: Methods of laparoscopic sterilisation. BRITISH MEDICAL JOURNAL 1975; 4:103-4. [PMID: 126714 PMCID: PMC1674916 DOI: 10.1136/bmj.4.5988.103-e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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114
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Bostock J. Ovarian carcinoma complicating pregnancy. Proc R Soc Med 1974; 67:13. [PMID: 4821584 PMCID: PMC1645690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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115
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Bostock J, Collins J. Dr Francis Campbell of Tarban Creek Asylum. Med J Aust 1971; 1:348-9. [PMID: 4925926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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116
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Sinclair AJM, Noad KB, Binns RT, Millingen KS, Bostock J, Simpson IG. Section of Neurology and Psychiatry. Med J Aust 1955. [DOI: 10.5694/j.1326-5377.1955.tb48910.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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117
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Birch HM, Bostock J, Arnott DWH, Sinclair AJM, Game J. Section of Neurology and Psychiatry. Med J Aust 1952. [DOI: 10.5694/j.1326-5377.1952.tb81974.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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118
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Maudsley H, Bostock J, Dawson WS, Forgan SB, Freeman WJ, Williams RG, Youngman NV. Section of Neurology and Psychiatry. Med J Aust 1950. [DOI: 10.5694/j.1326-5377.1950.tb80928.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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119
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Bostock J. Remarks on typhus fever. J R Soc Med 1842; 25:48-59. [PMID: 20895758 DOI: 10.1177/095952874202500107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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120
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121
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Bostock J. On the Chemical Constitution of Calcareous Tumours of the Uterus, and other parts. J R Soc Med 1835; 19:81-93. [PMID: 20895629 DOI: 10.1177/095952873501900109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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122
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Bostock J. History of a Case of Stammering, successfully treated by the long continued Use of Cathartics. J R Soc Med 1831; 16:72-7. [PMID: 20895570 DOI: 10.1177/09595287310160p108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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123
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Bostock J. Observations on the Saliva during the action of Mercury upon the System. J R Soc Med 1827; 13:73-87. [PMID: 20895507 DOI: 10.1177/09595287270130p109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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124
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Bostock J. Case of a Periodical Affection of the Eyes and Chest. Med Chir Trans 1819; 10:161-165. [PMID: 20895372 PMCID: PMC2116437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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125
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Bostock J. An Account of a Substance obtained from a diseased Ovarium, with some Remarks on diseased Secretions of an analogous nature. J R Soc Med 1819; 10:77-88. [PMID: 20895382 DOI: 10.1177/09595287190100p106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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126
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Bostock J. A Case of Loss of Power over the Voluntary Muscles. J R Soc Med 1818; 9:1-10. [PMID: 20895336 DOI: 10.1177/09595287180090p101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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127
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Bostock J. Account of a Chemical Examination of the Urine and Serum of the Blood of a person who had taken large quantities of Soda. J R Soc Med 1814; 5:80-92. [PMID: 20895236 DOI: 10.1177/095952871400500106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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128
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Bostock J. On the Nature and Analysis of Animal Fluids. Med Chir Trans 1813; 4:53-73. [PMID: 20895208 PMCID: PMC2128938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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129
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130
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Bostock J. Observations on Diabetes Insipidus. Med Chir Trans 1812; 3:107-122. [PMID: 20895161 PMCID: PMC2128894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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131
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Bostock J. Experiments on the Bark of the Coccoloba Uvifera. J R Soc Med 1812; 3:146-54. [PMID: 20895163 DOI: 10.1177/095952871200300113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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132
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Bostock J. Experiments and Observations on the Serum of the Blood. J R Soc Med 1811; 2:162-80. [PMID: 20895132 DOI: 10.1177/095952871100200116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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133
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Bostock J. On the Gelatine of the Blood. J R Soc Med 1809; 1:47-76. [PMID: 20895122 DOI: 10.1177/095952870900100106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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