Preoperative care/Catalogs/Beta-blocker evidence table: Difference between revisions

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|+  [[Randomized controlled trial]]s of perioperative<sup>'''*'''</sup> [[Adrenergic beta-antagonist|beta-blockers]] with at least 100<sup>†</sup> total patients.<ref name="pmid19474688">{{cite journal |author=Dunkelgrun M, Boersma E, Schouten O, ''et al.'' |title=Bisoprolol and fluvastatin for the reduction of perioperative cardiac mortality and myocardial infarction in intermediate-risk patients undergoing noncardiovascular surgery: a randomized controlled trial (DECREASE-IV) |journal=Ann. Surg. |volume=249 |issue=6 |pages=921–6 |year=2009 |month=June |pmid=19474688 |doi=10.1097/SLA.0b013e3181a77d00 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-4932&volume=249&issue=6&spage=921 |issn=}}</ref><ref name="pmid18479744">{{cite journal |author=Devereaux PJ, Yang H, Yusuf S, ''et al.'' |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume=371 |issue=9627 |pages=1839–47 |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref><ref name="pmid17585213">{{cite journal |author=Zaugg M, Bestmann L, Wacker J, ''et al.'' |title=Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up |journal=Anesthesiology |volume=107 |issue=1 |pages=33–44 |year=2007 |month=July |pmid=17585213 |doi=10.1097/01.anes.0000267530.62344.a4 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-3022&volume=107&issue=1&spage=33 |issn=}}</ref><ref name="pmid16793810">{{cite journal |author=Juul AB, Wetterslev J, Gluud C, ''et al.'' |title=Effect of perioperative beta blockade in patients with diabetes undergoing major non-cardiac surgery: randomised placebo controlled, blinded multicentre trial |journal=BMJ |volume=332 |issue=7556 |pages=1482 |year=2006 |month=June |pmid=16793810 |pmc=1482337 |doi=10.1136/bmj.332.7556.1482 |url=http://bmj.com/cgi/pmidlookup?view=long&pmid=16793810 |issn=}}</ref><ref name="pmid17070177">{{cite journal |author=Yang H, Raymer K, Butler R, Parlow J, Roberts R |title=The effects of perioperative beta-blockade: results of the Metoprolol after Vascular Surgery (MaVS) study, a randomized controlled trial |journal=Am. Heart J. |volume=152 |issue=5 |pages=983–90 |year=2006 |month=November |pmid=17070177 |doi=10.1016/j.ahj.2006.07.024 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-8703(06)00739-3 |issn=}}</ref><ref name="pmid15874923">{{cite journal |author=Brady AR, Gibbs JS, Greenhalgh RM, Powell JT, Sydes MR |title=Perioperative beta-blockade (POBBLE) for patients undergoing infrarenal vascular surgery: results of a randomized double-blind controlled trial |journal=J. Vasc. Surg. |volume=41 |issue=4 |pages=602–9 |year=2005 |month=April |pmid=15874923 |doi=10.1016/j.jvs.2005.01.048 |url=http://linkinghub.elsevier.com/retrieve/pii/S0741521405001898 |issn=}}</ref><ref name="pmid10588963">{{cite journal |author=Poldermans D, Boersma E, Bax JJ, ''et al.'' |title=The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group |journal=N. Engl. J. Med. |volume=341 |issue=24 |pages=1789–94 |year=1999 |month=December |pmid=10588963 |doi= |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=10588963&promo=ONFLNS19 |issn=}}</ref><ref name="pmid8929262">{{cite journal |author=Mangano DT, Layug EL, Wallace A, Tateo I |title=Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group |journal=N. Engl. J. Med. |volume=335 |issue=23 |pages=1713–20 |year=1996 |month=December |pmid=8929262 |doi= |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=8929262&promo=ONFLNS19 |issn=}}</ref><ref name="pmid19012955">{{cite journal| author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH| title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis. | journal=Lancet | year= 2008 | volume= 372 | issue= 9654 | pages= 1962-76 | pmid=19012955  
|+  Selected<sup>*</sup> [[randomized controlled trial]]s of perioperative<sup>''''''</sup> [[Adrenergic beta-antagonist|beta-blockers]].<ref name="pmid19474688">{{cite journal |author=Dunkelgrun M, Boersma E, Schouten O, ''et al.'' |title=Bisoprolol and fluvastatin for the reduction of perioperative cardiac mortality and myocardial infarction in intermediate-risk patients undergoing noncardiovascular surgery: a randomized controlled trial (DECREASE-IV) |journal=Ann. Surg. |volume=249 |issue=6 |pages=921–6 |year=2009 |month=June |pmid=19474688 |doi=10.1097/SLA.0b013e3181a77d00 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-4932&volume=249&issue=6&spage=921 |issn=}}</ref><ref name="pmid18479744">{{cite journal |author=Devereaux PJ, Yang H, Yusuf S, ''et al.'' |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume=371 |issue=9627 |pages=1839–47 |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref><ref name="pmid17585213">{{cite journal |author=Zaugg M, Bestmann L, Wacker J, ''et al.'' |title=Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up |journal=Anesthesiology |volume=107 |issue=1 |pages=33–44 |year=2007 |month=July |pmid=17585213 |doi=10.1097/01.anes.0000267530.62344.a4 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-3022&volume=107&issue=1&spage=33 |issn=}}</ref><ref name="pmid17070177">{{cite journal |author=Yang H, Raymer K, Butler R, Parlow J, Roberts R |title=The effects of perioperative beta-blockade: results of the Metoprolol after Vascular Surgery (MaVS) study, a randomized controlled trial |journal=Am. Heart J. |volume=152 |issue=5 |pages=983–90 |year=2006 |month=November |pmid=17070177 |doi=10.1016/j.ahj.2006.07.024 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-8703(06)00739-3 |issn=}}</ref><ref name="pmid16793810">{{cite journal |author=Juul AB, Wetterslev J, Gluud C, ''et al.'' |title=Effect of perioperative beta blockade in patients with diabetes undergoing major non-cardiac surgery: randomised placebo controlled, blinded multicentre trial |journal=BMJ |volume=332 |issue=7556 |pages=1482 |year=2006 |month=June |pmid=16793810 |pmc=1482337 |doi=10.1136/bmj.332.7556.1482 |url=http://bmj.com/cgi/pmidlookup?view=long&pmid=16793810 |issn=}}</ref><ref name="pmid16764198">{{cite journal| author=Neary WD, McCrirrick A, Foy C, Heather BP, Earnshaw JJ| title=Lessons learned from a randomised controlled study of perioperative beta blockade in high risk patients undergoing emergency surgery. | journal=Surgeon | year= 2006 | volume= 4 | issue= 3 | pages= 139-43 | pmid=16764198
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=16764198 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref><ref name="pmid15874923">{{cite journal |author=Brady AR, Gibbs JS, Greenhalgh RM, Powell JT, Sydes MR |title=Perioperative beta-blockade (POBBLE) for patients undergoing infrarenal vascular surgery: results of a randomized double-blind controlled trial |journal=J. Vasc. Surg. |volume=41 |issue=4 |pages=602–9 |year=2005 |month=April |pmid=15874923 |doi=10.1016/j.jvs.2005.01.048 |url=http://linkinghub.elsevier.com/retrieve/pii/S0741521405001898 |issn=}}</ref><ref name="pmid10588963">{{cite journal |author=Poldermans D, Boersma E, Bax JJ, ''et al.'' |title=The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group |journal=N. Engl. J. Med. |volume=341 |issue=24 |pages=1789–94 |year=1999 |month=December |pmid=10588963 |doi= |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=10588963&promo=ONFLNS19 |issn=}}</ref><ref name="pmid8929262">{{cite journal |author=Mangano DT, Layug EL, Wallace A, Tateo I |title=Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group |journal=N. Engl. J. Med. |volume=335 |issue=23 |pages=1713–20 |year=1996 |month=December |pmid=8929262 |doi= |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=8929262&promo=ONFLNS19 |issn=}}</ref><ref name="pmid19012955">{{cite journal| author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH| title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis. | journal=Lancet | year= 2008 | volume= 372 | issue= 9654 | pages= 1962-76 | pmid=19012955  
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19012955 | doi=10.1016/S0140-6736(08)61560-3 }}  [http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19306485 Review in: Ann Intern Med. 2009 Mar 17;150(6):JC3-4] <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref><br/>(See legend and notes at bottom on the table)
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19012955 | doi=10.1016/S0140-6736(08)61560-3 }}  [http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19306485 Review in: Ann Intern Med. 2009 Mar 17;150(6):JC3-4] <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref><br/>(See legend and notes at bottom on the table)
|-
|-
Line 68: Line 69:
| align="center" | 0%
| align="center" | 0%
| align="center" | 2.7%
| align="center" | 2.7%
|-
| rowspan="2" |MaVS<ref name="pmid17070177"/><br />2006<br/>No industry funding.
| rowspan="2" valign="top" | 496 patients:<br />&bull; 100% vascular surgery<br />&bull; [[Revised Cardiac Risk Index|RCRI]] = 2: 40%<br/>
| rowspan="2" valign="top" | [[Metoprolol]]<br />&bull; Start: day of surgery<br />&bull; Minimum allowed [[Heart rate|HR]]<sup>‡</sup>: > 50 bpm while awake;<br />>45 bpm while asleep.
| rowspan="2" | Placebo
| rowspan="2" | Hospital mortality
| rowspan="2" align="center" | 0.4%
| rowspan="2" align="center" | 2.8%
| rowspan="2" align="center" | 2.0% <!--From their Table V -->
| rowspan="2" align="center" | 1.6% <!--From their Table V -->
| colspan="2" | Intraoperative hypotension treated:
|-
| bgcolor="red" align="center" | 46%
| bgcolor="red" align="center" | 34%
|-
|-
| rowspan="2" |DIPOM<ref name="pmid16793810"/><br /> 2006<br />Partially funded by AstraZeneca
| rowspan="2" |DIPOM<ref name="pmid16793810"/><br /> 2006<br />Partially funded by AstraZeneca
Line 83: Line 98:
| align="center" | 0.2%
| align="center" | 0.2%
|-
|-
| rowspan="2" |MaVS<ref name="pmid17070177"/><br />2006<br/>No industry funding.
| rowspan="2" |Neary<ref name="pmid16764198"/><br /> 2006<br />Funded by the Gloucester Vascular Research Trust fund.
| rowspan="2" valign="top" | 496 patients:<br />&bull; 100% vascular surgery<br />&bull; [[Revised Cardiac Risk Index|RCRI]] = 2: 40%<br/>
| rowspan="2" valign="top" | 38 patients:<br />&bull; 21% vascular surgery<br />&bull; [[Revised Cardiac Risk Index|RCRI]] &gt; 2: uncertain<br/>
| rowspan="2" valign="top" | [[Metoprolol]]<br />&bull; Start: day of surgery<br />&bull; Minimum allowed [[Heart rate|HR]]<sup>‡</sup>: > 50 bpm while awake;<br />>45 bpm while asleep.
| rowspan="2" valign="top" | [[Atenolol]]<br />&bull; Started at induction<br />&bull; Minimum allowed [[Heart rate|HR]]<sup>‡</sup>: uncertain
| rowspan="2" | Placebo
| rowspan="2" | Placebo
| rowspan="2" | Hospital mortality
| rowspan="2" | Hospital mortality
| rowspan="2" align="center" | 0.4%
| rowspan="2" align="center" | 17%
| rowspan="2" align="center" | 2.8%
| rowspan="2" align="center" | 25%
| rowspan="2" align="center" | 2.0% <!--From their Table V -->
| rowspan="2" align="center" | Unknown
| rowspan="2" align="center" | 1.6% <!--From their Table V -->
| rowspan="2" align="center" | Unknown
| colspan="2" | Intraoperative hypotension treated:
| colspan="2" | Hypotension reported as an [[Adverse drug reaction|ADR]]:
|-
|-
| bgcolor="red" align="center" | 46%
| align="center" | 5.5%<br/>(one pt)
| bgcolor="red" align="center" | 34%
| align="center" | 5.0%<br/>(one pt)
|-
|-
| rowspan="2" | POBBLE<ref name="pmid15874923"/><br />2005<br/>No industry funding.
| rowspan="2" | POBBLE<ref name="pmid15874923"/><br />2005<br/>No industry funding.
Line 139: Line 154:
|-
|-
|colspan="11"|
|colspan="11"|
<nowiki>*</nowiki> This table does not include trials that used [[Adrenergic beta-antagonist|beta-blockers]] only for [[premedication]] or only during [[postoperative care]].<br/>
<nowiki>*</nowiki> Trials were selected by. Excluded trials are listed  below.<br/>
† Only large studies are included to reduce the risk of [[publication bias]].<br/>
<nowiki>†</nowiki> This table does not include trials that used [[Adrenergic beta-antagonist|beta-blockers]] only for [[premedication]] or only during [[postoperative care]].<br/>
‡ Minimum allowed [[Heart rate|HR]]. The lowest heart rate allowed before [[Adrenergic beta-antagonist|beta-blockers]] were withheld.<br/>
‡ Minimum allowed [[Heart rate|HR]]. The lowest heart rate allowed before [[Adrenergic beta-antagonist|beta-blockers]] were withheld.<br/>
§ The DECREASE I trial was stopped early when a significant benefit was observed and the [[relative risk]] was 0.2. By [http://medinformatics.uthscsa.edu/calculator/calc_bayes_r-example.shtml Bayesian analysis], the relative risk is more likely to be 0.5 which leads to an event rate in the treatment group of 8.5%.<br/>
§ The DECREASE I trial was stopped early when a significant benefit was observed and the [[relative risk]] was 0.2. By [http://medinformatics.uthscsa.edu/calculator/calc_bayes_r-example.shtml Bayesian analysis], the relative risk is more likely to be 0.5 which leads to an event rate in the treatment group of 8.5%.<br/>
Line 163: Line 178:
* {{cite journal| author=Urban MK, Markowitz SM, Gordon MA, Urquhart BL, Kligfield P| title=Postoperative prophylactic administration of beta-adrenergic blockers in patients at risk for myocardial ischemia. | journal=Anesth Analg | year= 2000 | volume= 90 | issue= 6 | pages= 1257-61 | pmid=10825304  
* {{cite journal| author=Urban MK, Markowitz SM, Gordon MA, Urquhart BL, Kligfield P| title=Postoperative prophylactic administration of beta-adrenergic blockers in patients at risk for myocardial ischemia. | journal=Anesth Analg | year= 2000 | volume= 90 | issue= 6 | pages= 1257-61 | pmid=10825304  
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=10825304 }}
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=10825304 }}
The following trial was excluded because of high rate of drop out of subjects:
* {{cite journal| author=Neary WD, McCrirrick A, Foy C, Heather BP, Earnshaw JJ| title=Lessons learned from a randomised controlled study of perioperative beta blockade in high risk patients undergoing emergency surgery. | journal=Surgeon | year= 2006 | volume= 4 | issue= 3 | pages= 139-43 | pmid=16764198
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=16764198 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/-->


==References==
==References==
<references/>
<references/>

Revision as of 11:16, 21 October 2009

Selected* randomized controlled trials of perioperative beta-blockers.[1][2][3][4][5][6][7][8][9][10]
(See legend and notes at bottom on the table)
Patients Intervention Comparison Outcome Results
Mortality Stroke Beta-blocker toxicity
Rx Control Rx Control Rx Control

Decrease IV[1][11]
2009
Drug provided by Merck KGaA

1066 patients:
•estimated risk of perioperative cardiovascular death of ≥ 1%
• 0% vascular surgery
RCRI = 2: ~100%
Bisoprolol
• Started a median of 34 days preop
• Minimum allowed HR: >50 bpm
Open label Mortality at 30 days 1.9% 3.0% 0.8% 0.6% Heart failure, clinically significant bradycardia or hypotension:
0.6% 0.4%
POISE[2]
2008
Partially funded by AstraZeneca
8351 patients:
• 42% vascular surgery
RCRI = 2: uncertain
Metoprolol succinate
• Started day of surgery
• Minimum allowed HR: > 50 bpm
Placebo Mortality at two weeks Overall 1% 0.5% Clinically significant hypotension:
3.1% 2.3% 15% 9.7%
Vascular pts
Significant benefit on composite events. Mortality by surgery type not reported.
BBSA[3]
2007
Partially funded by industry.
224 patients:
• 1% vascular surgery
RCRI = 2: uncertain
Bisoprolol
• Started day of surgery
Minimum allowed HR: > 50bpm
Placebo Hospital mortality 0.9% 0.9% 1.8% 0% Hypotension:
0% 2.7%
MaVS[4]
2006
No industry funding.
496 patients:
• 100% vascular surgery
RCRI = 2: 40%
Metoprolol
• Start: day of surgery
• Minimum allowed HR: > 50 bpm while awake;
>45 bpm while asleep.
Placebo Hospital mortality 0.4% 2.8% 2.0% 1.6% Intraoperative hypotension treated:
46% 34%
DIPOM[5]
2006
Partially funded by AstraZeneca
921 patients:
• 7% vascular surgery
RCRI > 2: uncertain
• All had diabetes
Metoprolol succinate
• Started 0-1 days preop
• Minimum allowed HR: >55 bpm
Placebo Hospital mortality 4%[10] 3%[10] 0.4% 0% Hypotension reported as an ADR:
0.4% 0.2%
Neary[6]
2006
Funded by the Gloucester Vascular Research Trust fund.
38 patients:
• 21% vascular surgery
RCRI > 2: uncertain
Atenolol
• Started at induction
• Minimum allowed HR: uncertain
Placebo Hospital mortality 17% 25% Unknown Unknown Hypotension reported as an ADR:
5.5%
(one pt)
5.0%
(one pt)
POBBLE[7]
2005
No industry funding.
103 patients:
• 100% vascular surgery
RCRI > 2: uncertain
Metoprolol
• Start with test dose one day preop
• Minimum allowed HR: > 50 bpm
Placebo (anesthesiologists were not blinded) Mortality at 30 days 3% 1% 2% 0% Intraoperative inotropes given:
92% 64%
Decrease I[8]
1999
Uncertain funding.
112 patients:
• 100% vascular surgery
RCRI = 2: uncertain, at least 67%
• Abnl stress echo: 100%
Bisoprolol
• Started a median of 37 days preop
• Minimum allowed HR: > 50 bpm
Open label Mortality at 30 days 3.4%
(8.5%§)
17.0% Not reported Discontinuation of study drug due to ADRs:
0% 0%
Mangano/ MSPI[9]
1996
No industry funding.
200 patients:
• 41% vascular surgery
RCRI > 2: uncertain
Atenolol
• Started IV on the day of surgery
• Minimum allowed HR: > 55 bpm
Placebo Hospital mortality 4% 2% 4%[12] 1%[12] Intraoperative inotropes given:[12]
13% 13%

* Trials were selected by. Excluded trials are listed below.
† This table does not include trials that used beta-blockers only for premedication or only during postoperative care.
‡ Minimum allowed HR. The lowest heart rate allowed before beta-blockers were withheld.
§ The DECREASE I trial was stopped early when a significant benefit was observed and the relative risk was 0.2. By Bayesian analysis, the relative risk is more likely to be 0.5 which leads to an event rate in the treatment group of 8.5%.
Notes:

  1. Color indicates statistically significant differences with green indicating benefit and red indicating harm.
  2. BBSA noted more drug toxicity among patients with abnormal beta1-adrenergic receptor genetic polymorphisms.[3]
  3. Mavs had trend toward most benefit in RCRI = 3.[4]

Excluded trials

The following randomized controlled trials of beta-blockers were excluded because beta-blockers were only given as premedication or only give during postoperative care. Trials that only used beta-blockers only for premedication:

Trials that only used beta-blockers only during postoperative care:


References

  1. 1.0 1.1 Dunkelgrun M, Boersma E, Schouten O, et al. (June 2009). "Bisoprolol and fluvastatin for the reduction of perioperative cardiac mortality and myocardial infarction in intermediate-risk patients undergoing noncardiovascular surgery: a randomized controlled trial (DECREASE-IV)". Ann. Surg. 249 (6): 921–6. DOI:10.1097/SLA.0b013e3181a77d00. PMID 19474688. Research Blogging.
  2. 2.0 2.1 Devereaux PJ, Yang H, Yusuf S, et al. (May 2008). "Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial". Lancet 371 (9627): 1839–47. DOI:10.1016/S0140-6736(08)60601-7. PMID 18479744. Research Blogging.
  3. 3.0 3.1 3.2 Zaugg M, Bestmann L, Wacker J, et al. (July 2007). "Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up". Anesthesiology 107 (1): 33–44. DOI:10.1097/01.anes.0000267530.62344.a4. PMID 17585213. Research Blogging.
  4. 4.0 4.1 4.2 Yang H, Raymer K, Butler R, Parlow J, Roberts R (November 2006). "The effects of perioperative beta-blockade: results of the Metoprolol after Vascular Surgery (MaVS) study, a randomized controlled trial". Am. Heart J. 152 (5): 983–90. DOI:10.1016/j.ahj.2006.07.024. PMID 17070177. Research Blogging.
  5. 5.0 5.1 Juul AB, Wetterslev J, Gluud C, et al. (June 2006). "Effect of perioperative beta blockade in patients with diabetes undergoing major non-cardiac surgery: randomised placebo controlled, blinded multicentre trial". BMJ 332 (7556): 1482. DOI:10.1136/bmj.332.7556.1482. PMID 16793810. PMC 1482337. Research Blogging.
  6. 6.0 6.1 Neary WD, McCrirrick A, Foy C, Heather BP, Earnshaw JJ (2006). "Lessons learned from a randomised controlled study of perioperative beta blockade in high risk patients undergoing emergency surgery.". Surgeon 4 (3): 139-43. PMID 16764198.
  7. 7.0 7.1 Brady AR, Gibbs JS, Greenhalgh RM, Powell JT, Sydes MR (April 2005). "Perioperative beta-blockade (POBBLE) for patients undergoing infrarenal vascular surgery: results of a randomized double-blind controlled trial". J. Vasc. Surg. 41 (4): 602–9. DOI:10.1016/j.jvs.2005.01.048. PMID 15874923. Research Blogging.
  8. 8.0 8.1 Poldermans D, Boersma E, Bax JJ, et al. (December 1999). "The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group". N. Engl. J. Med. 341 (24): 1789–94. PMID 10588963[e]
  9. 9.0 9.1 Mangano DT, Layug EL, Wallace A, Tateo I (December 1996). "Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group". N. Engl. J. Med. 335 (23): 1713–20. PMID 8929262[e]
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