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Perez E, Chu J, Bania T, Medlej K. L-carnitine increases survival in a murine model of severe verapamil toxicity. Acad Emerg Med 2012; 18:1135-40. [PMID: 22092894 DOI: 10.1111/j.1553-2712.2011.01217.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES L-carnitine is an essential compound involved in cellular energy production through free fatty acid metabolism. It has been theorized that severe verapamil toxicity "shifts" heart energy production away from free fatty acids and toward other sources, contributing to profound cardiogenic shock. The primary study objective was to determine whether intravenous (IV) L-carnitine affects survival in severe verapamil toxicity. Secondary objectives were to determine the effects on hemodynamic parameters. The authors hypothesized that IV L-carnitine would increase both survival and hemodynamic parameters in severe verapamil toxicity. METHODS This was a controlled, blinded animal investigation. Sixteen male rats were anesthetized, ventilated, and instrumented to record mean arterial pressure (MAP) and heart rate. Verapamil toxicity was achieved by a constant infusion of 5 mg/kg/hr. After 5 minutes a bolus of 50 mg/kg of either L-carnitine or normal saline was given. The experiment concluded when either 10% of baseline MAP was achieved or 150 minutes had elapsed. The data were analyzed using Kaplan-Meier analysis, log rank test, and analysis of variance. RESULTS The median survival for the animals in the L-carnitine group was 140.75 minutes (interquartile range [IQR] = 98.6 to 150 minutes), and for those in the normal saline group it was 49.19 minutes (IQR = 39.02 to 70.97 minutes; p = 0.0001). At 15 minutes the MAP was 20.45 mm Hg greater in the animals in the L-carnitine group than in the animals in the normal saline group (95% confidence interval [CI] = 0.25 to 40.65; p = 0.047). CONCLUSIONS When compared with saline, IV L-carnitine increases survival and MAP in a murine model of severe verapamil toxicity.
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Affiliation(s)
- Eric Perez
- Department of Emergency Medicine, St Luke's/Roosevelt Hospital, New York, NY, USA.
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Hayes CL, Knight M. Calcium Channel Blocker Toxicity in Dogs and Cats. Vet Clin North Am Small Anim Pract 2012; 42:263-77, vi. [DOI: 10.1016/j.cvsm.2011.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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53
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Abstract
This brief communication reviews the non-diabetic uses and utility of insulin. It highlights the lesser known uses in medicine, psychiatry, suregery and diagnostics that this versatile peptide has.
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Affiliation(s)
| | - Shaharyar Khan Niazi
- Islamic International Medical and Dental College, Riphah International University, Islamabad, Pakistan
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Management of calcium channel antagonist overdose with hyperinsulinemia-euglycemia therapy: case series and review of the literature. Case Rep Crit Care 2012; 2012:927040. [PMID: 24826345 PMCID: PMC4010055 DOI: 10.1155/2012/927040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Accepted: 01/17/2012] [Indexed: 01/21/2023] Open
Abstract
Calcium channel antagonists (CCAs) are commonly involved in drug overdoses. Standard approaches to the management of CCA overdoses, including fluid resuscitation, gut decontamination, administration of calcium, glucagon, and atropine, as well as supportive care, are often ineffective. We report on two patients who improved after addition of hyperinsulinemia-euglycemia (HIE) therapy. We conclude with a literature review on hyperinsulinemia-euglycemia therapy with an exploration of the physiology behind its potential use.
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Hasson R, Mulcahy V, Tahir H. Amlodipine poisioning complicated with acute non-cardiogenic pulmonary oedema. BMJ Case Rep 2011; 2011:bcr.07.2011.4467. [PMID: 22679190 DOI: 10.1136/bcr.07.2011.4467] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Amlodipine poisoning is an uncommon presentation with potentially life threatening complications. As there are few cases of severe poisoning documented, management guidelines are limited. The authors present the case of a 22-year-old female who presented to hospital 6 h after ingesting 280 mg of amlodipine. She was treated with aggressive fluid resuscitation and calcium gluconate infusion. She went on to develop acute non-cardiogenic pulmonary odema for which she needed a frusemide infusion. She stayed in hospital for 5 days and was discharged after a psychiatric review with no long-term complications. The authors discuss the other management options available for patients presenting with amlodipine overdose.
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Affiliation(s)
- Ruairi Hasson
- Department of Acute Medicine, Whipps Cross Hospital, London, UK
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Engebretsen KM, Kaczmarek KM, Morgan J, Holger JS. High-dose insulin therapy in beta-blocker and calcium channel-blocker poisoning. Clin Toxicol (Phila) 2011; 49:277-83. [DOI: 10.3109/15563650.2011.582471] [Citation(s) in RCA: 156] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Soar J, Perkins GD, Abbas G, Alfonzo A, Barelli A, Bierens JJLM, Brugger H, Deakin CD, Dunning J, Georgiou M, Handley AJ, Lockey DJ, Paal P, Sandroni C, Thies KC, Zideman DA, Nolan JP. European Resuscitation Council Guidelines for Resuscitation 2010 Section 8. Cardiac arrest in special circumstances: Electrolyte abnormalities, poisoning, drowning, accidental hypothermia, hyperthermia, asthma, anaphylaxis, cardiac surgery, trauma, pregnancy, electrocution. Resuscitation 2011; 81:1400-33. [PMID: 20956045 DOI: 10.1016/j.resuscitation.2010.08.015] [Citation(s) in RCA: 362] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jasmeet Soar
- Anaesthesia and Intensive Care Medicine, Southmead Hospital, North Bristol NHS Trust, Bristol, UK.
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58
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Deakin CD, Morrison LJ, Morley PT, Callaway CW, Kerber RE, Kronick SL, Lavonas EJ, Link MS, Neumar RW, Otto CW, Parr M, Shuster M, Sunde K, Peberdy MA, Tang W, Hoek TLV, Böttiger BW, Drajer S, Lim SH, Nolan JP. Part 8: Advanced life support: 2010 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science with Treatment Recommendations. Resuscitation 2011; 81 Suppl 1:e93-e174. [PMID: 20956032 DOI: 10.1016/j.resuscitation.2010.08.027] [Citation(s) in RCA: 167] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Cohen V, Jellinek SP, Fancher L, Sangwan G, Wakslak M, Marquart E, Farahani C. Tarka® (Trandolapril/Verapamil Hydrochloride Extended-Release) overdose. J Emerg Med 2011; 40:291-5. [DOI: 10.1016/j.jemermed.2008.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2008] [Revised: 07/25/2008] [Accepted: 10/08/2008] [Indexed: 10/21/2022]
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60
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Hadjipavlou G, Hafeez A, Messer B, Hughes T. Management of lercanidipine overdose with hyperinsulinaemic euglycaemia therapy: case report. Scand J Trauma Resusc Emerg Med 2011; 19:8. [PMID: 21251326 PMCID: PMC3035020 DOI: 10.1186/1757-7241-19-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2010] [Accepted: 01/20/2011] [Indexed: 11/17/2022] Open
Abstract
This case report describes the first reported overdose of the dihydropyridine calcium channel blocker (CCB) lercanidipine. A 49 yr old male presented to the Emergency Department 3 hrs after the ingestion of 560 mg of lercanidipine. In the department he had a witnessed seizure within 15 minutes of arrival attributed to the overdose. Following immediate recovery of consciousness after the seizure, he had refractory hypotension and bradycardia which failed to respond to fluid resuscitation, glucagon therapy, and intravenous calcium. He went on to require vasopressor support with noradrenaline and was treated with high dose insulin therapy which was successful in achieving cardiovascular stability. Vasopressor therapy was no longer required within one half life of lercanidipine, and the total stay on intensive care was one day before transfer to a ward. Calcium channel blocker overdose is an uncommon but life-threatening overdose. Treatment for severe toxicity is similar to b-blocker overdose. Hypotension is treated with intravenous fluid therapy, intravenous calcium and possibly glucagon with vasopressor or inotropic support as required. Atropine is used to attempt reversal of bradycardia. High doses of intravenous insulin with intravenous dextrose as required (hyperinsulinaemic euglycaemia or HIET), has also been successfully reported. Experimental animal data suggests that HIET is of benefit and potentially superior to fluid therapy, calcium, glucagon and potentially vasopressor therapy. HIET effectively and sustainably reverses hypotension, bradycardia and improves myocardial contractility and metabolism. Current advice in calcium channel blocker overdose is to begin therapy early in toxicity, starting with a 1.0 IU/kg insulin bolus followed by an infusion of 0.5 IU/kg/hr of insulin and dextrose as required titrated to clinical response.
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Vanden Hoek TL, Morrison LJ, Shuster M, Donnino M, Sinz E, Lavonas EJ, Jeejeebhoy FM, Gabrielli A. Part 12: cardiac arrest in special situations: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. Circulation 2010; 122:S829-61. [PMID: 20956228 DOI: 10.1161/circulationaha.110.971069] [Citation(s) in RCA: 392] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Soar J, Perkins G, Abbas G, Alfonzo A, Barelli A, Bierens J, Brugger H, Deakin C, Dunning J, Georgiou M, Handley A, Lockey D, Paal P, Sandroni C, Thies KC, Zideman D, Nolan J. Kreislaufstillstand unter besonderen Umständen: Elektrolytstörungen, Vergiftungen, Ertrinken, Unterkühlung, Hitzekrankheit, Asthma, Anaphylaxie, Herzchirurgie, Trauma, Schwangerschaft, Stromunfall. Notf Rett Med 2010. [DOI: 10.1007/s10049-010-1374-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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63
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Kleinman ME, Chameides L, Schexnayder SM, Samson RA, Hazinski MF, Atkins DL, Berg MD, de Caen AR, Fink EL, Freid EB, Hickey RW, Marino BS, Nadkarni VM, Proctor LT, Qureshi FA, Sartorelli K, Topjian A, van der Jagt EW, Zaritsky AL. Part 14: Pediatric Advanced Life Support. Circulation 2010; 122:S876-908. [DOI: 10.1161/circulationaha.110.971101] [Citation(s) in RCA: 473] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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64
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Lynch MJ, Katz KD, Callaway CW, Logue ES. Survival of verapamil-poisoned rats treated with triiodothyronine. J Med Toxicol 2010; 6:94-9. [PMID: 20237969 DOI: 10.1007/s13181-010-0016-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Life-threatening toxicity due to calcium channel blocker ingestion is commonly encountered by emergency medicine physicians and toxicologists. Despite a vast array of research on its treatment, results have proven inconsistent. The goal of this study is to evaluate potential vasopressor effects of triiodothyronine (T3) in rats poisoned with verapamil. Following anesthesia and intubation, ten Sprague-Dawley rats were given intravenous verapamil infusion of 10 mg/kg/h. This dose was titrated until a mean arterial pressure (MAP) of 50-55 mmHg was achieved and maintained for a period of at least 5 min. The verapamil infusion was then maintained at that rate. Five rats were randomized to receive a T3 bolus of 0.4 mcg/kg preceding an infusion of 1.5 mcg/kg/day which was doubled every 2 min until any of the following endpoints: systolic blood pressure of 100 mmHg, an elapsed time of 60 min, or death. The other five received an equal volume of normal saline solution. The primary outcome measure was survival with secondary outcomes of MAP and heart rate. The T3 group did have a slightly longer, yet not statistically significant, average time to cessation of electrical activity-30.0 +/- 14.4 min versus 23.8 +/- 9.5 min in the placebo group. Average MAP decreased nearly identically in the two groups. Heart rates were not reliable indicators of toxicity in this rat model as there was little decrease until immediately prior to death in most animals. Despite significant variability in toxicity among individual animals, no statistically significant difference in survival time, heart rate, or MAP was found between groups treated with T3 and those receiving saline.
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Affiliation(s)
- Michael J Lynch
- Department of Emergency Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
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65
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Abstract
Calcium channel blocker toxicity has been associated with marked hyperglycemia responsive only to high-dose insulin therapy. The exact mechanism(s) of this induced hyperglycemia has not been clearly delineated. The glucose transporter GLUT1 is expressed in a wide variety of cell types and is largely responsible for a basal level of glucose transport. GLUT1 also is activated by cell stress. The specific purpose of this study was to investigate the effects of the calcium channel blocker verapamil on the glucose uptake activity of GLUT1 in L929 fibroblasts cells. Dose-dependent effects of verapamil on glucose uptake were studied using L929 fibroblast cells with 2-deoxyglucose. Verapamil had a dose-dependent inhibitory effect on both basal and stress-activated transport activity of GLUT1. Basal activity was inhibited 50% by 300 μM verapamil, while 150 μM verapamil completely inhibited the activation induced by the stress of glucose deprivation. These effects were reversible and required verapamil to be present during the stress. Alteration of calcium concentrations by addition of 5 mM CaCl₂ or 4 mM EDTA had no effect on verapamil action. This study reveals the unique finding that verapamil has inhibitory effects on the transport activity of GLUT1 independent of its effects on calcium concentrations. The inhibition of GLUT1 may be one of the contributing factors to the hyperglycemia observed in CCB poisoning.
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66
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Morrison LJ, Deakin CD, Morley PT, Callaway CW, Kerber RE, Kronick SL, Lavonas EJ, Link MS, Neumar RW, Otto CW, Parr M, Shuster M, Sunde K, Peberdy MA, Tang W, Hoek TLV, Böttiger BW, Drajer S, Lim SH, Nolan JP, Adrie C, Alhelail M, Battu P, Behringer W, Berkow L, Bernstein RA, Bhayani SS, Bigham B, Boyd J, Brenner B, Bruder E, Brugger H, Cash IL, Castrén M, Cocchi M, Comadira G, Crewdson K, Czekajlo MS, Davies SR, Dhindsa H, Diercks D, Dine CJ, Dioszeghy C, Donnino M, Dunning J, El Sanadi N, Farley H, Fenici P, Feeser VR, Foster JA, Friberg H, Fries M, Garcia-Vega FJ, Geocadin RG, Georgiou M, Ghuman J, Givens M, Graham C, Greer DM, Halperin HR, Hanson A, Holzer M, Hunt EA, Ishikawa M, Ioannides M, Jeejeebhoy FM, Jennings PA, Kano H, Kern KB, Kette F, Kudenchuk PJ, Kupas D, La Torre G, Larabee TM, Leary M, Litell J, Little CM, Lobel D, Mader TJ, McCarthy JJ, McCrory MC, Menegazzi JJ, Meurer WJ, Middleton PM, Mottram AR, Navarese EP, Nguyen T, Ong M, Padkin A, Ferreira de Paiva E, Passman RS, Pellis T, Picard JJ, Prout R, Pytte M, Reid RD, Rittenberger J, Ross W, Rubertsson S, Rundgren M, Russo SG, Sakamoto T, Sandroni C, Sanna T, Sato T, Sattur S, Scapigliati A, Schilling R, Seppelt I, Severyn FA, Shepherd G, Shih RD, Skrifvars M, Soar J, Tada K, Tararan S, Torbey M, Weinstock J, Wenzel V, Wiese CH, Wu D, Zelop CM, Zideman D, Zimmerman JL. Part 8: Advanced Life Support. Circulation 2010; 122:S345-421. [DOI: 10.1161/circulationaha.110.971051] [Citation(s) in RCA: 250] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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67
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Levosimendan as treatment option in severe verapamil intoxication: a case report and review of the literature. Case Rep Med 2010; 2010. [PMID: 20814559 PMCID: PMC2931406 DOI: 10.1155/2010/546904] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 05/09/2010] [Accepted: 07/08/2010] [Indexed: 11/17/2022] Open
Abstract
Cardiovascular shock due to verapamil intoxication is often refractory to standard resuscitation methods. Recommended therapy includes prevention of further absorption of the drug, inotropic therapy, calcium gluconate, and hyperinsulinemia/euglycemia therapy. Often further measures are needed such as ventricular pacing or mechanical circulatory support. Still, mortality remains high.
Levosimendan, an inotropic agent, that enhances myofilament response to calcium, increases myocardial contraction and could therefore be beneficial in verapamil intoxication. Here, we report the case of a 60-year-old patient with clinically severe verapamil poisoning who presented with shock, bradycardia, and sopor. Standard therapy including high-dose inotropes failed to ameliorate the signs of intoxication. But additional therapy with levosimendan led to rapid improvement. Based on this observation, the literature is reviewed focusing on utilization of levosimendan in the treatment of calcium channel blocker overdose. We suggest to consider levosimendan as additional treatment option in patients with cardiovascular shock due to verapamil intoxication that are refractory to standard management.
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68
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Graudins A, Najafi J, Rur-sc MPM. Treatment of experimental verapamil poisoning with levosimendan utilizing a rodent model of drug toxicity. Clin Toxicol (Phila) 2010; 46:50-6. [DOI: 10.1080/15563650701665092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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69
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Nickson CP, Little M. Early use of high-dose insulin euglycaemic therapy for verapamil toxicity. Med J Aust 2009; 191:350-2. [PMID: 19769561 DOI: 10.5694/j.1326-5377.2009.tb02822.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2009] [Accepted: 07/28/2009] [Indexed: 11/17/2022]
Abstract
A 49-year-old man presented with verapamil toxicity complicated by hypotension and a junctional rhythm, in the context of deliberate self-poisoning with multiple drugs. The patient's hypotension normalised following the early use of high-dose insulin euglycaemic therapy (HIET), without the need for additional vasopressors; it recurred when HIET was prematurely stopped, and again stabilised when HIET was recommenced. Consideration should be given to the early use of HIET in treating severe calcium channel blocker toxicity, rather than as a last resort after other therapies have failed.
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71
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Varpula T, Rapola J, Sallisalmi M, Kurola J. Levosimendan for Calcium Channel Blocker Poisoning in Humans. Anesth Analg 2009. [DOI: 10.1213/ane.0b013e3181add5eb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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72
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Espinoza TR, Mottram AR, Bryant SM. Levosimendan for Calcium Channel Blocker Poisoning in Humans. Anesth Analg 2009; 109:992; author reply 992-3. [DOI: 10.1213/ane.0b013e3181add57d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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73
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Olson KR, Erdman AR, Woolf AD, Scharman EJ, Christianson G, Caravati EM, Wax PM, Booze LL, Manoguerra AS, Keyes DC, Chyka PA, Troutman WG. Calcium Channel Blocker Ingestion: An Evidence-Based Consensus Guideline for Out-of-Hospital Management. Clin Toxicol (Phila) 2009; 43:797-822. [PMID: 16440509 DOI: 10.1080/15563650500357404] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
In 2003, U.S. poison control centers were consulted after 9650 ingestions of calcium channel blockers (CCBs), including 57 deaths. This represents more than one-third of the deaths reported to the American Association of Poison Control Centers' Toxic Exposure Surveillance System database that were associated with cardiovascular drugs and emphasizes the importance of developing a guideline for the out-of-hospital management of calcium channel blocker poisoning. The objective of this guideline is to assist poison center personnel in the appropriate out-of-hospital triage and initial management of patients with suspected ingestions of calcium channel blockers. An evidence-based expert consensus process was used to create this guideline. This guideline applies to ingestion of calcium channel blockers alone and is based on an assessment of current scientific and clinical information. The expert consensus panel recognizes that specific patient care decisions may be at variance with this guideline and are the prerogative of the patient and the health professionals providing care, considering all of the circumstances involved. The panel's recommendations follow. The grade of recommendation is in parentheses. 1) All patients with stated or suspected self-harm or the recipient of a potentially malicious administration of a CCB should be referred to an emergency department immediately regardless of the amount ingested (Grade D). 2) Asymptomatic patients are unlikely to develop symptoms if the interval between the ingestion and the call is greater than 6 hours for immediate-release products, 18 hours for modified-release products other than verapamil, and 24 hours for modified-release verapamil. These patients do not need referral or prolonged observation (Grade D). 3) Patients without evidence of self-harm should have further evaluation, including determination of the precise dose ingested, history of other medical conditions, and the presence of co-ingestants. Ingestion of either an amount that exceeds the usual maximum single therapeutic dose or an amount equal to or greater than the lowest reported toxic dose, whichever is lower (see Table 5), would warrant consideration of referral to an emergency department (Grade D). 4) Do not induce emesis (Grade D). 5) Consider the administration of activated charcoal orally if available and no contraindications are present. However, do not delay transportation in order to administer charcoal (Grade D). 6) For patients who merit evaluation in an emergency department, ambulance transportation is recommended because of the potential for life-threatening complications. Provide usual supportive care en route to the hospital, including intravenous fluids for hypotension. Consider use of intravenous calcium, glucagon, and epinephrine for severe hypotension during transport, if available (Grade D). 7) Depending on the specific circumstances, follow-up calls should be made to determine outcome at appropriate intervals based on the clinical judgment of the poison center staff (Grade D).
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Affiliation(s)
- Kent R Olson
- American Association of Poison Control Centers, 3201 New Mexico Ave., NW, Suite 330, Washington, DC 20016, USA
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Holger JS, Engebretsen KM, Marini JJ. High dose insulin in toxic cardiogenic shock. Clin Toxicol (Phila) 2009; 47:303-7. [DOI: 10.1080/15563650802701929] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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75
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Smith SW, Ferguson KL, Hoffman RS, Nelson LS, Greller HA. Prolonged severe hypotension following combined amlodipine and valsartan ingestion. Clin Toxicol (Phila) 2009; 46:470-4. [DOI: 10.1080/15563650701779695] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kanagarajan K, Marraffa JM, Bouchard NC, Krishnan P, Hoffman RS, Stork CM. The use of vasopressin in the setting of recalcitrant hypotension due to calcium channel blocker overdose. Clin Toxicol (Phila) 2008; 45:56-9. [PMID: 17357383 DOI: 10.1080/15563650600795669] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Treatment of hypotension caused by calcium channel blocker overdose (CCB) remains a challenge. We describe the successful use of vasopressin in two patients with massive CCB overdoses in whom hypotension was unresponsive to calcium, glucagon, insulin, and conventional vasopressor therapies. While various modes of treatments have been used to treat the hypotension of CCB overdose, this is the first report to our knowledge of the successful use of vasopressin in this clinical setting.
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77
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Abstracts of the European Association of Poisons Centres and Clinical Toxicologists XXV International Congress. Clin Toxicol (Phila) 2008. [DOI: 10.1080/07313820500207624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Azendour H, Belyamani L, Atmani M, Balkhi H, Haimeur C. Severe amlodipine intoxication treated by hyperinsulinemia euglycemia therapy. J Emerg Med 2008; 38:33-5. [PMID: 18657931 DOI: 10.1016/j.jemermed.2007.11.077] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Revised: 11/01/2007] [Accepted: 11/09/2007] [Indexed: 11/25/2022]
Abstract
The objective of this study was to report a use of hyperinsulinemia euglycemia therapy in severe amlodipine intoxication. Intoxication with 420 mg of amlodipine caused severe hypotension in a 20-year-old female patient. The patient was initially treated with fluids, calcium gluconate, and epinephrine without effect. She was then given hyperinsulinemia euglycemia therapy. We observed a rise in blood pressure (BP) approximately 30 min after insulin was given and the BP was subsequently responsive to epinephrine. The patient was weaned from pressors 5 h after insulin therapy. The trachea was extubated 24 h after ingesting amlodipine, and the patient was transferred for psychiatric treatment 3 days later. This possible positive inotropic effect of insulin therapy in patients with calcium channel blocker intoxication supports previous findings. It is suggested that hyperinsulinemia euglycemia therapy may be considered as a first-line therapy in amlodipine intoxication.
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Affiliation(s)
- Hicham Azendour
- Medical Critical Care Unit, Military Hospital of Mohamed V, Rabat, Morocco
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79
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Abstract
Acutely poisoned children remain a common problem facing pediatricians working in acute care medicine in the United States and worldwide. The management of such children continues to be challenging, and their care has evolved throughout the years. The concept of gastric decontamination in acute poisoning has significantly changed over the past 10 years, and many of the previously used techniques have been abandoned or fallen out of favor for lack of evidence to their benefit or unacceptable serious risks and side effects. Supportive care continues to be the cornerstone in managing most poisoned children. Only a few patients benefit from antidotes or specific interventions.
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Affiliation(s)
- Usama A Hanhan
- Division of Pediatrics, Department of Critical Care Medicine, University Community Hospital, 3100 East Flecher Ave., Tampa, FL 33613, USA.
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80
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Abstract
Toxicologic conditions are encountered in critically ill patients due to intentional or unintentional misuse of or exposure to therapeutic or illicit drugs. Additionally, toxicities related to medical interventions may develop in hospitalized patients. This review focuses on recent developments in the field of critical care toxicology. Early interventions to decrease absorption or enhance elimination of toxins have limited value. Specific interventions to manage toxicities due to analgesics, sedative-hypnotics, antidepressants, antipsychotics, cardiovascular agents, alcohols, carbon monoxide, and cholinergic agents are reviewed. Hospital-acquired toxicities due to methemoglobinemia, propylene glycol, and propofol should be recognized and treated. The clinician is continually required to incorporate clinical judgment along with available scientific data and clinical evidence to determine the best therapy for toxicologic conditions.
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81
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Wills BK, Liu JM, Wahl M. Third-degree AV block from extended-release diltiazem ingestion in a nine-month-old. J Emerg Med 2008; 38:328-31. [PMID: 18403171 DOI: 10.1016/j.jemermed.2007.10.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 05/21/2007] [Accepted: 10/28/2007] [Indexed: 10/22/2022]
Abstract
Calcium channel blocker (CCB) overdose is associated with dysrhythmias and atrioventricular (AV) block, however, experience with infant CCB overdose is limited. A 9-month-old girl was found playing with tablets of extended-release diltiazem 120 mg. The patient had two episodes of emesis, which contained pill fragments, and was brought to the Emergency Department (ED) 4.5 h after being found. Vital signs were: rectal temperature 37.1 degrees C, pulse 87 beats/min, respiratory rate 30-40 breaths/min, blood pressure 72/48 mm Hg, and oxygen saturation (SpO(2)) 99% on room air. Otherwise, the patient was well-appearing, with normal skin color and examination. The electrocardiogram revealed third-degree atrioventricular block with a ventricular rate of 90 beats/min, QRS 68 ms, and QTc 411 ms. Atropine 0.1 mg i.v. was given, which increased the heart rate to 100-110 beats/min. Calcium gluconate 500 mg was also given intravenously. Laboratory evaluation revealed bicarbonate 17 mEq/L, anion gap 16, and glucose 129 mg/dL. On hospital day 1, the patient was noted to have a junctional rhythm with a rate of 90-100, and systolic blood pressure of 80-90 mm Hg. No additional medications were given. Early on day 2, the patient converted spontaneously to a normal sinus rhythm and was discharged approximately 42 h after presentation to the ED. In addition to bradycardia and hypotension, this 9-month-old patient manifested third-degree AV block after ingesting extended-release diltiazem.
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Affiliation(s)
- Brandon K Wills
- Department of Emergency Medicine, Madigan Army Medical Center, Tacoma, Washington 98431, USA
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82
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Abstract
An early and rapid response to severe injury or trauma is the development of hyperglycemia, which has long been thought to be an essential survival response by providing fuel for vital organ systems and facilitating mobilization of interstitial fluid reserves by increasing osmolarity. However, glucose can also be metabolized via the hexosamine biosynthesis pathway (HBP), leading to the synthesis of uridine diphosphate N-acetyl-glucosamine(UDP-GlcNAc). UDP-GlcNAc is a substrate for the addition, via an O-linkage, of a single N-acetylglucosamine to serine or threonine residues of nuclear and cytoplasmic proteins (O-glycosylation, O-GlcNAc). There is increasing appreciation that protein O-glycosylation is a highly dynamic posttranslational modification that plays a key role in signal transduction pathways. Sustained increases in O-GlocNAc have been implicated in the development of diabetes and diabetic complications; however, recent studies have demonstrated that stress leads to a transient increase in O-GlcNAc levels that is associated with increased tolerance to stress. Indeed, activation of pathways leading to O-GlcNAc formation improves cell survival after I/R injury, whereas inhibition of O-GlcNAc formation decreases cell survival. In addition, in rodent models of trauma-hemorrhage, increasing O-GlcNAc levels during resuscitation improves cardiac function and organ perfusion and attenuates the inflammatory response. At the cellular level, increasing O-GlcNAc levels attenuates nuclear factor-kappaB activation. It is noteworthy that other metabolic-based treatments for severe injury such as glucose-insulin-potassium and glutamine also lead to increased HBP flux and O-GlcNAc levels. The goal of this review is to summarize our current understanding of the role of the HBP and O-GlcNAc on the regulation of cell function and survival and to present evidence to support the notion that activation of these pathways represents a novel treatment strategy for severe injury and trauma.
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Affiliation(s)
- John C Chatham
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama 35294-0005, USA.
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83
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Ezidiegwu C, Spektor Z, Nasr MR, Kelly KC, Rosales LG. A Case Report on the Role of Plasma Exchange in the Management of a Massive Amlodipine Besylate Intoxication. Ther Apher Dial 2008; 12:180-4. [DOI: 10.1111/j.1744-9987.2008.00567.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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84
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85
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Patel NP, Pugh ME, Goldberg S, Eiger G. Hyperinsulinemic Euglycemia Therapy for Verapamil Poisoning: A Review. Am J Crit Care 2007. [DOI: 10.4037/ajcc2007.16.5.498] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Treatment of patients with verapamil overdose remains challenging. Traditional decontamination and supportive measures with intravenous calcium and vasopressors are the mainstays in initial care. Recently, the successful use of rescue hyperinsulinemic euglycemia therapy has been described in multiple cases. Treatment resulted in improved hemodynamic parameters and increased metabolic efficiency in patients with a low-output, myocardial shock state. Information on clinical use of hyperinsulinemic euglycemia therapy in humans is limited to case reports and small case series; no controlled clinical trials have been done. Hyperinsulinemic euglycemia therapy should be considered for patients with calcium channel blocker overdose who do not respond to initial supportive therapy.
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Affiliation(s)
- Nirav P. Patel
- Nirav P. Patel is a fellow in the Division of Pulmonary, Allergy, and Critical Care Medicine and the Center for Sleep and Respiratory Neurobiology, and Meredith E. Pugh is chief resident in the Department of Medicine, at the Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Meredith E. Pugh
- Nirav P. Patel is a fellow in the Division of Pulmonary, Allergy, and Critical Care Medicine and the Center for Sleep and Respiratory Neurobiology, and Meredith E. Pugh is chief resident in the Department of Medicine, at the Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Steven Goldberg
- Steven Goldberg, director of the medical intensive care unit, and Glenn Eiger, associate chairman for the department of medicine, are both members of the Division of Pulmonary and Critical Care Medicine, Albert Einstein Medical Center, in Philadelphia
| | - Glenn Eiger
- Steven Goldberg, director of the medical intensive care unit, and Glenn Eiger, associate chairman for the department of medicine, are both members of the Division of Pulmonary and Critical Care Medicine, Albert Einstein Medical Center, in Philadelphia
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86
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Patel NP, Pugh ME, Goldberg S, Eiger G. Hyperinsulinemic Euglycemia Therapy for Verapamil Poisoning: Case Report. Am J Crit Care 2007. [DOI: 10.4037/ajcc2007.16.5.520] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A 49-year-old woman was brought to the emergency department because of an intentional overdose of sustained-release verapamil along with captopril and glyburide. The estimated interval between ingestion and the time she was found was several hours. Initial findings were blood pressure 72/39 mm Hg, heart rate 32/min, and a score of 9 on the Glasgow Coma Scale. She was intubated and given intravenous fluid and vasopressor support. Decontamination with activated charcoal was instituted. Administration of dopamine and norepinephrine, atropine, sodium bicarbonate, and calcium chloride did not yield significant clinical improvement. Hyperinsulinemic euglycemia therapy was started: a bolus of regular insulin then infusions of insulin and 10% dextrose. After 24 hours of therapy, the bradycardia resolved and the patient’s hemodynamic condition stabilized with normalization of cardiac indices. On day 5 the patient was transferred to the medical unit, and on day 8 she was discharged to psychiatric care.
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Affiliation(s)
- Nirav P. Patel
- Nirav P. Patel is a fellow in the Division of Pulmonary, Allergy, and Critical Care Medicine and the Center for Sleep and Respiratory Neurobiology, and Meredith E. Pugh is chief resident in the Department of Medicine, at the Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Meredith E. Pugh
- Nirav P. Patel is a fellow in the Division of Pulmonary, Allergy, and Critical Care Medicine and the Center for Sleep and Respiratory Neurobiology, and Meredith E. Pugh is chief resident in the Department of Medicine, at the Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Steven Goldberg
- Steven Goldberg, director of the medical intensive care unit, and Glenn Eiger, associate chairman for the department of medicine, are both members of the Division of Pulmonary and Critical Care Medicine, Albert Einstein Medical Center, in Philadelphia
| | - Glenn Eiger
- Steven Goldberg, director of the medical intensive care unit, and Glenn Eiger, associate chairman for the department of medicine, are both members of the Division of Pulmonary and Critical Care Medicine, Albert Einstein Medical Center, in Philadelphia
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87
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Mycyk MB, Bryant SM. Is simple bedside glucose assessment prognostic in calcium channel blocker overdose?*. Crit Care Med 2007; 35:2216-7. [PMID: 17713372 DOI: 10.1097/01.ccm.0000281459.21600.a6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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88
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Ranniger C, Roche C. Are One or Two Dangerous? Calcium Channel Blocker Exposure in Toddlers. J Emerg Med 2007; 33:145-54. [PMID: 17692766 DOI: 10.1016/j.jemermed.2007.02.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Revised: 08/23/2006] [Accepted: 11/16/2006] [Indexed: 01/21/2023]
Abstract
Unintentional pediatric ingestions of calcium channel blockers are increasing in frequency due to increased use of this antihypertensive class. Potential toxic effects include severe refractory hypotension and death; however, the true toxicity of unintentional pediatric ingestions of 1-2 pills is poorly defined. A literature review was conducted to more closely determine toxic and lethal dosages of calcium channel blockers in the pediatric population under 6 years of age. Results indicate that, although most accidental pediatric ingestions are asymptomatic, a small number do result in cardiovascular instability or even death. The dihydropyridines, particularly nifedipine, and the phenylalkylamine verapamil are most often implicated in symptomatic ingestions. There are no adequate data to identify which children are predisposed to illness, or to determine cutoffs for toxic dosages. However, ingestions of only one pill have been documented to cause severe symptoms, including death. Thus, emergency evaluation to assess potential toxicity is necessary, and gastrointestinal decontamination and in-hospital observation of at least 6 h after toxic ingestion for regular release medications, and 12-24 h after toxic ingestion for sustained release medications is recommended for all cases of unintentional calcium channel blocker ingestion in children younger than 6 years of age.
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Affiliation(s)
- Claudia Ranniger
- Department of Emergency Medicine, George Washington University, Washington, DC, USA
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89
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Erickson TB, Thompson TM, Lu JJ. The approach to the patient with an unknown overdose. Emerg Med Clin North Am 2007; 25:249-81; abstract vii. [PMID: 17482020 DOI: 10.1016/j.emc.2007.02.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Toxic overdose can present with various clinical signs and symptoms. These may be the only clues to diagnosis when the cause of toxicity is unknown at the time of initial assessment. The prognosis and clinical course of recovery of a patient poisoned by a specific agent depends largely on the quality of care delivered within the first few hours in the emergency setting. Usually the drug or toxin can be quickly identified by a careful history, a directed physical examination, and commonly available laboratory tests. Once the patient has been stabilized, the physician must consider how to minimize the bioavailability of toxin not yet absorbed, which antidotes (if any) to administer, and if other measures to enhance elimination are necessary.
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Affiliation(s)
- Timothy B Erickson
- Department of Emergency Medicine, Division of Clinical Toxicology, University of Illinois at Chicago, Toxikon Consortium, Chicago, IL 60612, USA.
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90
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Kerns W. Management of beta-adrenergic blocker and calcium channel antagonist toxicity. Emerg Med Clin North Am 2007; 25:309-31; abstract viii. [PMID: 17482022 DOI: 10.1016/j.emc.2007.02.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
State-of-the-art therapy for beta-adrenergic receptor blocker and calcium channel antagonist toxicity is reviewed in the light of new insights into drug-induced shock. A brief discussion of pathophysiology, including cardiac, hemodynamic, and metabolic effects of cardiac drug toxicity, provides a foundation for understanding the basis of therapy. The major focus of this review is a critical evaluation of antidotal use of calcium, glucagon, catecholamines, insulin-euglycemia, and other novel therapies based on investigational studies and cumulative clinical experience.
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Affiliation(s)
- William Kerns
- Division of Toxicology, Department of Emergency Medicine, Carolinas Medical Center, Medical Education Building, Charlotte, NC 28203, USA.
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91
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Greene SL, Gawarammana I, Wood DM, Jones AL, Dargan PI. Relative safety of hyperinsulinaemia/euglycaemia therapy in the management of calcium channel blocker overdose: a prospective observational study. Intensive Care Med 2007; 33:2019-24. [PMID: 17622512 DOI: 10.1007/s00134-007-0768-y] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Accepted: 06/08/2007] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To examine the clinical safety of hyperinsulinaemia/euglycaemia therapy (HIET) in calcium channel blocker (CCB) poisoning. DESIGN A prospective observational study examining biochemical and clinical outcomes of a HIET protocol administered under local poisons centre guidance. SETTING Critical care settings. PATIENTS Seven patients with significant CCB toxicity [systolic blood pressure (BP) <90 mmHg] treated with HIET. INTERVENTIONS HIET was commenced after correction of any pre-existing hypoglycaemia ([blood glucose]<65 mg/dl) or hypokalaemia ([K+]<3.5mmol/l). A quantity of 50 ml of 50% intravenous dextrose was followed by a loading dose (1 unit/kg) of intravenous short-acting insulin and an insulin maintenance infusion (0.5-2.0 units/kg/h). Euglycaemia was maintained using 5-10% dextrose infusions. Potassium was maintained within low normal range (3.8-4.0 mmol/l). MEASUREMENTS AND RESULTS Six patients survived. All patients received fluids, calcium, and conventional inotropes. Three patients (who all ingested diltiazem) received an insulin-loading dose; all experienced a significant sustained rise in systolic BP (>10 mmHg) during the first hour of HIET. Systolic BP did not increase significantly in four patients who did not receive insulin loading. Single episodes of non-clinically significant biochemical hypoglycaemia and hypokalaemia were recorded in one and two patients respectively. Hypoglycaemia was not recorded in any patient administered HIET during the 24[Symbol: see text]h following CCB ingestion. CONCLUSIONS HIET used to treat CCB-induced cardiovascular toxicity is a safe intervention when administered in a critical care setting. Maximal HIET efficacy may be obtained when HIET is administered in conjunction with conventional therapy relatively early in the course of severe CCB poisoning when insulin resistance is high.
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Affiliation(s)
- Shaun L Greene
- Medical Toxicology Unit, Guy's and St. Thomas Poisons Unit, Guy's and St. Thomas' NHS Foundation Trust, Avonley Rd, New Cross, SE14 5ER London, UK.
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92
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Hung YM, Olson KR. Acute amlodipine overdose treated by high dose intravenous calcium in a patient with severe renal insufficiency. Clin Toxicol (Phila) 2007; 45:301-3. [PMID: 17453887 DOI: 10.1080/15563650601072233] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Calcium salts are frequently used in the treatment of calcium antagonist poisoning. Different dosing regimens have been employed. The major risk of high dose calcium therapy is iatrogenic hypercalcemia, especially in patients with diminished renal function. Repeated doses of calcium are therefore often avoided; however, inadequate use of intravenous calcium may cause treatment failure in severe calcium antagonist overdose. We report our experience of using high dose intravenous calcium chloride effectively and safely to treat severe amlodipine overdose in a patient with severe renal insufficiency.
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Affiliation(s)
- Yao-Min Hung
- Division of Nephrology, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
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93
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Abstract
A case of severe amlodipine overdose with only mild symptoms is described. Plasma concentrations of amlodipine were measured in serial samples by gas chromatography. There was no concomitant overdose. The present case is compared with previous reported cases of amlodipine overdose where patients all developed severe symptoms. We conclude that amlodipine overdose does not always cause severe symptoms.
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94
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Hasin T, Leibowitz D, Antopolsky M, Chajek-Shaul T. The Use of Low-Dose Insulin in Cardiogenic Shock due to Combined Overdose of Verapamil, Enalapril and Metoprolol. Cardiology 2006; 106:233-6. [PMID: 16685130 DOI: 10.1159/000093191] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Accepted: 03/11/2006] [Indexed: 11/19/2022]
Abstract
We describe a case of severe heart failure due to the combined effect of verapamil and enalapril overdose in a patient treated regularly with metoprolol. The patient was dependent for 2 days on glucagon and dopamine infusion but remained oliguric, with deteriorating renal function. Marked improvement in all hemodynamic parameters was noted a short time after initiation of treatment with low-dose insulin infusion (1-2 units/h), which allowed the prompt withdrawal of glucagon and dopamine. We discuss the efficacy of glucose-insulin treatment in toxic cardiac depression and suggest that a low dose may be beneficial in similar cases.
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Affiliation(s)
- Tal Hasin
- Department of Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.
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95
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Levine MD, Boyer E. Hyperinsulinemia-euglycemia therapy: a useful tool in treating calcium channel blocker poisoning. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2006; 10:149. [PMID: 16879723 PMCID: PMC1751009 DOI: 10.1186/cc4964] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Hyperinsulinemia-euglycemia (HIE) therapy, when initiated promptly and aggressively, may offer considerable advantages in the treatment of calcium channel blocker poisoning. Although its mechanism of action is uncertain, HIE improves the efficiency with which the poisoned myocardium uses metabolic fuel, the end result of which is improvements in inotropy and other cardiovascular parameters. Although HIE is not universally accepted, the reports included in the previous issue of Critical Care should prompt clinicians to consider HIE an appropriate therapy specifically for calcium channel blocker poisoning.
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Affiliation(s)
- Michael D Levine
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Edward Boyer
- Division of Medical Toxicology, Department of Emergency Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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96
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Harris NS. Case records of the Massachusetts General Hospital. Case 24-2006. A 40-year-old woman with hypotension after an overdose of amlodipine. N Engl J Med 2006; 355:602-11. [PMID: 16899781 DOI: 10.1056/nejmcpc069016] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- N Stuart Harris
- Department of Emergency Medicine, Massachusetts General Hospital, and Harvard Medical School, USA
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97
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Vogt S, Mehlig A, Hunziker P, Scholer A, Jung J, González AB, Weinmann W, Marsch S. Survival of severe amlodipine intoxication due to medical intensive care. Forensic Sci Int 2006; 161:216-20. [PMID: 16872774 DOI: 10.1016/j.forsciint.2006.02.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2005] [Revised: 02/03/2006] [Accepted: 02/03/2006] [Indexed: 10/24/2022]
Abstract
We report the case of attempted suicide with amlodipine, chlorthalidone and mefenamic acid and subsequent medical intensive care measures which resulted in total recovery of a 42-year-old male. After admission to the medical intensive care unit the intoxicated patient was deeply hypotensive and needed fluid replacement, dobutamine and norepinephrine. Additionally insulin and calcium gluconate were given. Since hypotension persisted and the patient developed oliguria, terlipressin was applied and finally showed an effect on blood pressure and on urinary output. A volume overload of 7 L in the first 24 h resulted in a pulmonary edema. The patient was started on non-invasive ventilation with continuous positive airway pressure (CPAP) and frusemide was added to the therapy with good success. Quantitative determination of amlodipine in plasma samples was performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The highest amlodipine concentrations was measured in the plasma sample collected approximately 8 h after ingestion of the drug, and was 393 microg/L. Four days later, it was possible to stop the treatment with catecholamines, at that time the amlodipine plasma concentration had declined to 132 microg/L, still tenfold higher than therapeutic (5-18 microg/L). Elimination half-life of amlodipine is approximately 55 h. After 6 days in the intensive care unit the patient was transferred to psychiatric treatment. Intensive care management and plasma levels in this intoxication case are compared to data from literature on other cases.
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Affiliation(s)
- Susanne Vogt
- Institute of Forensic Medicine, University Hospital, Freiburg, Germany
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98
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Abstract
Antidotal therapy can be lifesaving in the management of poisoned children. Although supportive care is sufficient in many cases, a specific antidote can significantly reduce morbidity and mortality in a number of poisoning scenarios, and so the pediatric emergency medicine practitioner must be familiar with its indications for use, dosage and administration, and contraindications. A number of new antidotes have emerged in recent years. This review discusses the pediatric uses and limitations of intravenous N-acetylcysteine, octreotide, crotaline Fab antivenom, fomepizole, atropine and pralidoxime autoinjectors and provides some brief discussion on newer antidotes for which data is only starting to emerge.
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Affiliation(s)
- Diane P Calello
- Division of Emergency Medicine and the Poison Control Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
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99
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Halcomb SE, Nelson LS. Case files of the medical toxicology fellowship training program at the New York City Poison Control Center: Hypotensive death — Therapeutic complication or suicide? J Med Toxicol 2006; 2:75-80. [DOI: 10.1007/bf03161176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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100
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Lheureux PER, Zahir S, Gris M, Derrey AS, Penaloza A. Bench-to-bedside review: hyperinsulinaemia/euglycaemia therapy in the management of overdose of calcium-channel blockers. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2006; 10:212. [PMID: 16732893 PMCID: PMC1550937 DOI: 10.1186/cc4938] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hyperinsulinaemia/euglycaemia therapy (HIET) consists of the infusion of high-dose regular insulin (usually 0.5 to 1 IU/kg per hour) combined with glucose to maintain euglycaemia. HIET has been proposed as an adjunctive approach in the management of overdose of calcium-channel blockers (CCBs). Indeed, experimental data and clinical experience, although limited, suggest that it could be superior to conventional pharmacological treatments including calcium salts, adrenaline (epinephrine) or glucagon. This paper reviews the patho-physiological principles underlying HIET. Insulin administration seems to allow the switch of the cell metabolism from fatty acids to carbohydrates that is required in stress conditions, especially in the myocardium and vascular smooth muscle, resulting in an improvement in cardiac contractility and restored peripheral resistances. Studies in experimental verapamil poisoning in dogs have shown that HIET significantly improves metabolism, haemodynamics and survival in comparison with conventional therapies. Clinical experience currently consists only of a few isolated cases or short series in which the administration of HIET substantially improved cardiovascular conditions in life-threatening CCB poisonings, allowing the progressive discontinuation of vasoactive agents. While we await further well-designed clinical trials, some rational recommendations are made about the use of HIET in severe CBB overdose. Although the mechanism of action is less well understood in this condition, some experimental data suggesting a potential benefit of HIET in β-adrenergic blocker toxicity are discussed; clinical data are currently lacking.
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Affiliation(s)
- Philippe E R Lheureux
- Acute Poisoning Unit, Department of Emergency Medicine, Erasme University Hospital, 808 route de Lennik, B 1070 Brussels, Belgium.
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