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Precordial thump
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<h2 id="procedure">Procedure</h2> <p>In a precordial thump, a provider strikes at the middle of a person's <a href="/facts/Human_sternum/qIPMpyIz">sternum</a> with the <a href="/facts/Ulna/6J7D2mhe">ulnar</a> aspect of the fist.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> The intent is to interrupt a potentially life-threatening rhythm. The thump is thought to produce an electrical <a href="/facts/Depolarization/qGX8lFXE">depolarization</a> of 2 to 5 <a href="/facts/Joule/9ndq9jD2">joules</a>. </p> <h2 id="effectiveness">Effectiveness</h2> <p>The precordial thump may only be effective if administered within seconds of the onset of <a href="/facts/Ventricular_fibrillation/7rCnI7zf">ventricular fibrillation</a> or pulseless <a href="/facts/Ventricular_tachycardia/UrRmY5Q6">ventricular tachycardia</a>.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> It is not helpful for treating ventricular fibrillation if too much time has passed.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> It also has very low effectiveness for treating <a href="/facts/Arrhythmia/ooEpr46Q">ventricular arrhythmia</a><a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> (possibly even making it worse),<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a><a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> and ventricular tachycardia,<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> especially when compared to CPR and defibrillation as alternatives. </p><p>Historically, it was recommended as the initial action to take when addressing such witnessed and monitored cardiac arrests in a hospital setting.<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a> More recently, European guidelines recommend it should no longer be routinely used with available evidence suggesting it does not improve survival to hospital discharge.<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> However, American guidelines continue advocating its use by healthcare professionals.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> </p> <h2 id="adverse-effects-and-appearance">Adverse effects and appearance</h2> <p>There are concerns that the precordial thump can result in worsening of a person's heart rhythm more often than it improves it.<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> </p><p>The use of the precordial thump technique has sometimes been shown in famous <a href="/facts/Movie/wM3b9Kk3">movies</a> and <a href="/facts/Television/X4YG5nT1">television</a>, such as in <a href="/facts/The_Good_Doctor_(American_TV_series)/MVns2xbu"><i>The Good Doctor</i></a> Season 2 episode 5 in which it is performed by Dr. Brown, and <a href="/facts/The_Resident_(TV_series)/RYgUQevp"><i>The Resident</i></a> Season 1 episode 2 in which it is performed by Conrad Hawkins, usually in passing without any explanation. Untrained laypersons have been known to attempt it, and sometimes cause additional injury to the person as the blow must be carefully aimed. If applied incorrectly it may cause further injury, for instance inducing <a href="/facts/Commotio_cordis/y0HQf1vN">cardiac arrest by blunt trauma</a>, or breaking <a href="/facts/Xiphoid_process/vdESRC8v">the tip of the sternum</a>, risking fatal damage to the <a href="/facts/Liver/Rtp4Fk2b">liver</a> or other abdominal organs. </p><p>At one time, the technique was also taught as part of standard CPR training with the requirement that it must be administered within 60 seconds of the onset of symptoms. That time restriction, combined with a number of injuries caused by improper technique, resulted in the procedure being removed from CPR training. </p> <h2 id="history">History</h2> <p>James E. Pennington and <a href="/facts/Bernard_Lown/QbIEfXXn">Bernard Lown</a> at <a href="/facts/Harvard_University/Lhy9L1cx">Harvard University</a> are credited with formalizing this technique in the medical literature. They published their report in the <i><a href="/facts/New_England_Journal_of_Medicine/hJlWQPJC">New England Journal of Medicine</a></i> in the early 1970s. <a href="/facts/Richard_S._Crampton/5PayXLjk">Richard S. Crampton</a> and George Craddock, at the <a href="/facts/University_of_Virginia/SPNDITbg">University of Virginia</a> helped to promote the <a href="/facts/Paramedic/crUNVATd">paramedic</a> use of chest thump through a curious accident. In 1970, the Charlottesville-Albemarle Rescue Squad (VA) was transporting a patient with an unstable <a href="/facts/Cardiac_rhythm/AouErvDx">cardiac rhythm</a> in what was then called a Mobile Coronary Care Unit. When the vehicle inadvertently hit a speed bump in a shopping center parking lot, the patient's normal heart rhythm was restored. Further research confirmed that chest thumping patients with life-threatening <a href="/facts/Heart_arrhythmia/ooEpr46Q">arrhythmias</a> could save lives.<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> </p> <h2 id="fist-pacing">Fist pacing</h2> <p>Percussion pacing or fist pacing was proposed as a method of delivering <a href="/facts/Transcutaneous_pacing/SdXCwNLT">mechanical pacing</a> to someone in cardiac arrest. There is little evidence to support its use.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> In 1920, German physician Eduard Schott originally described percussion pacing, and a 2007 BJA article describes good benefit to this technique.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Neumar, RW; Shuster, M; Callaway, CW; Gent, LM; Atkins, DL; Bhanji, F; Brooks, SC; de Caen, AR; Donnino, MW; Ferrer, JM; Kleinman, ME; Kronick, SL; Lavonas, EJ; Link, MS; Mancini, ME; Morrison, LJ; O'Connor, RE; Samson, RA; Schexnayder, SM; Singletary, EM; Sinz, EH; Travers, AH; Wyckoff, MH; Hazinski, MF (3 November 2015). "Part 1: Executive Summary: 2015 American Heart Association Guidelines Update for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care". Circulation. 132 (18 Suppl 2): S315-67. doi:10.1161/cir.0000000000000252. PMID 26472989. <a href="https://doi.org/10.1161%2Fcir.0000000000000252" target="_blank">https://doi.org/10.1161%2Fcir.0000000000000252</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Nehme, Z; Andrew, E; Bernard, SA; Smith, K (Aug 27, 2013). "Treatment of monitored out-of-hospital ventricular fibrillation and pulseless ventricular tachycardia utilizing the precordial thump". Resuscitation. 84 (12): 1691–6. doi:10.1016/j.resuscitation.2013.08.011. PMID 23994203. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Neumar, RW; Shuster, M; Callaway, CW; Gent, LM; Atkins, DL; Bhanji, F; Brooks, SC; de Caen, AR; Donnino, MW; Ferrer, JM; Kleinman, ME; Kronick, SL; Lavonas, EJ; Link, MS; Mancini, ME; Morrison, LJ; O'Connor, RE; Samson, RA; Schexnayder, SM; Singletary, EM; Sinz, EH; Travers, AH; Wyckoff, MH; Hazinski, MF (3 November 2015). "Part 1: Executive Summary: 2015 American Heart Association Guidelines Update for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care". Circulation. 132 (18 Suppl 2): S315-67. doi:10.1161/cir.0000000000000252. PMID 26472989. <a href="https://doi.org/10.1161%2Fcir.0000000000000252" target="_blank">https://doi.org/10.1161%2Fcir.0000000000000252</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Cave, DM; Gazmuri, RJ; Otto, CW; Nadkarni, VM; Cheng, A; Brooks, SC; Daya, M; Sutton, RM; Branson, R; Hazinski, MF (Nov 2, 2010). "Part 7: CPR techniques and devices: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care". Circulation. 122 (18 Suppl 3): S720-8. doi:10.1161/CIRCULATIONAHA.110.970970. PMC 3741663. PMID 20956223. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741663" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741663</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Cotoi, S. (1981-05-01). "Precordial thump and termination of cardiac reentrant tachyarrhythmias". American Heart Journal. 101 (5): 675–677. doi:10.1016/0002-8703(81)90239-8. ISSN 0002-8703. PMID 7223609. <a href="https://dx.doi.org/10.1016/0002-8703%2881%2990239-8" target="_blank">https://dx.doi.org/10.1016/0002-8703%2881%2990239-8</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Miller, Jeffrey; Tresch, Donald; Horwitz, Louis; Thompson, Bruce M; Aprahamian, Charles; Darin, Joseph C (1984-09-01). "The precordial thump". Annals of Emergency Medicine. Cardiopulmonary-cerebral Resuscitation: State of the Art. 13 (9, Part 2): 791–794. doi:10.1016/S0196-0644(84)80439-4. ISSN 0196-0644. PMID 6476543. <a href="http://www.sciencedirect.com/science/article/pii/S0196064484804394" target="_blank">http://www.sciencedirect.com/science/article/pii/S0196064484804394</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Madias, Christopher; Maron, Barry J.; Alsheikh-Ali, Alawi A.; Rajab, Mohammad; Estes, N. A. Mark; Link, Mark S. (2009-10-01). "Precordial thump for cardiac arrest is effective for asystole but not for ventricular fibrillation". Heart Rhythm. 6 (10): 1495–1500. doi:10.1016/j.hrthm.2009.06.029. ISSN 1547-5271. PMID 19968931. <a href="http://www.sciencedirect.com/science/article/pii/S1547527109006870" target="_blank">http://www.sciencedirect.com/science/article/pii/S1547527109006870</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Haman, Ludek; Parizek, Petr; Vojacek, Jan (2009-01-01). "Precordial thump efficacy in termination of induced ventricular arrhythmias". Resuscitation. 80 (1): 14–16. doi:10.1016/j.resuscitation.2008.07.022. ISSN 0300-9572. PMID 18952350. <a href="http://www.sciencedirect.com/science/article/pii/S0300957208006151" target="_blank">http://www.sciencedirect.com/science/article/pii/S0300957208006151</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Cotoi, S. (1981-05-01). "Precordial thump and termination of cardiac reentrant tachyarrhythmias". American Heart Journal. 101 (5): 675–677. doi:10.1016/0002-8703(81)90239-8. ISSN 0002-8703. PMID 7223609. <a href="https://dx.doi.org/10.1016/0002-8703%2881%2990239-8" target="_blank">https://dx.doi.org/10.1016/0002-8703%2881%2990239-8</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Haman, Ludek; Parizek, Petr; Vojacek, Jan (2009-01-01). "Precordial thump efficacy in termination of induced ventricular arrhythmias". Resuscitation. 80 (1): 14–16. doi:10.1016/j.resuscitation.2008.07.022. ISSN 0300-9572. PMID 18952350. <a href="http://www.sciencedirect.com/science/article/pii/S0300957208006151" target="_blank">http://www.sciencedirect.com/science/article/pii/S0300957208006151</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Nehme, Z; Andrew, E; Bernard, SA; Smith, K (Aug 27, 2013). "Treatment of monitored out-of-hospital ventricular fibrillation and pulseless ventricular tachycardia utilizing the precordial thump". Resuscitation. 84 (12): 1691–6. doi:10.1016/j.resuscitation.2013.08.011. PMID 23994203. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Miller, Jeffrey; Tresch, Donald; Horwitz, Louis; Thompson, Bruce M; Aprahamian, Charles; Darin, Joseph C (1984-09-01). "The precordial thump". Annals of Emergency Medicine. Cardiopulmonary-cerebral Resuscitation: State of the Art. 13 (9, Part 2): 791–794. doi:10.1016/S0196-0644(84)80439-4. ISSN 0196-0644. PMID 6476543. <a href="http://www.sciencedirect.com/science/article/pii/S0196064484804394" target="_blank">http://www.sciencedirect.com/science/article/pii/S0196064484804394</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Dee, Ryan; Smith, Michael; et al. (2021). "The effect of alternative methods of cardiopulmonary resuscitation — Cough CPR, percussion pacing or precordial thump — on outcomes following cardiac arrest. A systematic review". Resuscitation. 162: 73–81. <a href="https://www.resuscitationjournal.com/article/S0300-9572(21)00036-8/abstract" target="_blank">https://www.resuscitationjournal.com/article/S0300-9572(21)00036-8/abstract</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>Hutchison, Julia; Hu, Eugene W. (2024). "Precordial Thump". National Library of Medicine. Retrieved 23 October 2024. <a href="https://www.ncbi.nlm.nih.gov/books/NBK545174/" target="_blank">https://www.ncbi.nlm.nih.gov/books/NBK545174/</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Nehme, Z; Andrew, E; Bernard, SA; Smith, K (Aug 27, 2013). "Treatment of monitored out-of-hospital ventricular fibrillation and pulseless ventricular tachycardia utilizing the precordial thump". Resuscitation. 84 (12): 1691–6. doi:10.1016/j.resuscitation.2013.08.011. PMID 23994203. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>Diehl, Digby (2000). "The Emergency Medical Services Program". To Improve Health and Health Care. Vol. 2000. Robert Wood Johnson Foundation. p. 21. {{cite book}}: |work= ignored (help) <a href="http://www.rwjf.org/content/dam/web-assets/2000/01/the-emergency-medical-services-program" target="_blank">http://www.rwjf.org/content/dam/web-assets/2000/01/the-emergency-medical-services-program</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>"Guideline 11.3: Precordial Thump & Fist Pacing" (PDF). Index of Guidelines. Australian Resuscitation Council and New Zealand Resuscitation Council. July 2011. Archived from the original on October 6, 2011. Retrieved February 15, 2014. <a href="http://www.resus.org.au/policy/guidelines/section_11/precordial_thump.htm" target="_blank">http://www.resus.org.au/policy/guidelines/section_11/precordial_thump.htm</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>Eich, C.; Bleckmann, A.; Schwarz, S. K. W. (2007). "Percussion pacing--an almost forgotten procedure for haemodynamically unstable bradycardias? A report of three case studies and review of the literature". British Journal of Anaesthesia. 98 (4): 429–433. doi:10.1093/bja/aem007. PMID 17327252. <a href="https://doi.org/10.1093%2Fbja%2Faem007" target="_blank">https://doi.org/10.1093%2Fbja%2Faem007</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> </ol>