Document Detail

Haemodynamic patterns in patients with scorpion envenomation.
MedLine Citation:
PMID:  9659196     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To study cardiovascular haemodynamics following scorpion envenomation. SETTING: Intensive care unit of a university hospital. PATIENTS: Eight patients with Indian red scorpion (Mesobuthus tamulus) stings. INTERVENTION: Captopril (6.25 to 12.5 mg orally) every 30 minutes until pulmonary oedema resolved. MAIN OUTCOME MEASURES: Haemodynamic data obtained by pulmonary artery catheterisation. RESULTS: Two haemodynamic patterns were seen. There was a predominant vascular effect in one patient, with severe hypertension, tachycardia, increased systemic vascular resistance index (SVRI = 5893, and normal cardiac index (2.73 l/m2). A predominant myocardial effect with left ventricular dysfunction and normal right ventricular function was seen in the other seven patients, with tachycardia, pulmonary oedema, mild hypotension, reduced stroke volume (mean (SD), 25.9 (8.3) ml/m2), normal SVRI (1812 (831), and increased pulmonary artery wedge pressure (PAWP = 25 (4.4) mm Hg). Following mild dehydration pulmonary oedema subsided (PAWP = 14 (8.5) mm Hg) in three of these patients, but hypovolaemic shock developed (right atrial pressure (RAP) = 1.3 (2.1) mm Hg); pulmonary oedema recurred with rehydration. One patient developed fatal cardiogenic shock with raised PAWP (27 mm Hg) and RAP (11 mm Hg), and vasodilatation (SVRI = 1129 Stroke volume (30.5 (8.7) ml/m2) and cardiac output (4.3 (1.5) 1/m2) improved with resolution of pulmonary oedema (PAWP = 14.4 (4.2) mm Hg) following afterload reduction with captopril. CONCLUSIONS: Mild envenomation causes severe vasoconstriction and hypertension. Severe envenomation produces predominant left ventricular dysfunction with normal systemic vascular resistance manifesting as pulmonary oedema or severe hypotension depending on the fluid balance. Shock due to biventricular dysfunction and vasodilatation occurs terminally.
D R Karnad
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Heart (British Cardiac Society)     Volume:  79     ISSN:  1355-6037     ISO Abbreviation:  Heart     Publication Date:  1998 May 
Date Detail:
Created Date:  1998-07-22     Completed Date:  1998-07-22     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  9602087     Medline TA:  Heart     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  485-9     Citation Subset:  AIM; IM    
Department of Medicine, King Edward VII Memorial Hospital, Parel, Bombay, India.
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MeSH Terms
Antihypertensive Agents / therapeutic use
Arachnidism / complications,  physiopathology*
Captopril / therapeutic use
Middle Aged
Pulmonary Edema / etiology
Pulmonary Wedge Pressure
Shock, Cardiogenic / etiology
Ventricular Dysfunction / etiology
Reg. No./Substance:
0/Antihypertensive Agents; 62571-86-2/Captopril
Comment In:
Heart. 1999 Aug;82(2):253-4   [PMID:  10465613 ]
Heart. 2000 May;83(5):585-6   [PMID:  10836840 ]
Erratum In:
Heart 1998 Jun;79(6):631

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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