Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .
Perioperative myocardial ischaemia in patients undergoing surgery for fractured hip randomized to incremental spinal, single-dose spinal or general anaesthesia.
Quantitative assessment of myocardial ischaemia during incremental spinal , single-dose spinal and general anaesthesia may provide guidelines for the choice of anaesthetic technique for osteo synthesis of hip fractures in the elderly atherosclerotic individual . Forty-three patients with coronary artery disease were allocated to receive either incremental spinal anaesthesia ( bupivacaine 0.5 % plain ) ( A ) , single-dose spinal anaesthesia ( 2.5 mL of bupivacaine 0.5 % plain ) ( B ) or general anaesthesia ( fentanyl , thiopentone , atracurium , enflurane , N2O/O2 ) ( C ) for hip surgery .  ST segment monitoring was performed from the induction of anaesthesia and for the following 48 h , and perioperative hypotension , blood loss and fluid therapy were recorded . ST depression developed in two out of 14 ( A ) , seven out of 15 ( B ) and six out of 14 ( C ) patients ( P = 0.14 ) . In ( A ) , a total of seven ST depressions occurred in the observation period as opposed to 125 in ( B ) and 16 in ( C ) ( P < 0.05 ) . Intra-operative ST depression only occurred in ( B ) . Three ( A ) , 33 ( B ) and 40 ( C ) hypotensive events were recorded ( P < 0.002 ) . Altogether , 56 % of hypotensive patients developed ST depression compared with 10 % of normotensive patients ( P < 0.003 ) . In ( A ) , 1.6 mL of 0.5 % bupivacaine were used as opposed to the fixed 2.5 mL dose in ( B ) ( P < 0.001 ) . In the first post-operative week , mortality was higher in ( B ) ( P < 0.05 ) but , after 1 month , there was no significant difference in mortality between the three groups . The incidence of hypotension and myocardial ischaemia was lowest in the group receiving incremental spinal anaesthesia
Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .