Emergency room thoracotomy for the resuscitation of patients with "fatal" penetrating injuries of the heart

Emergency Department Resuscitative Thoracotomy: Indications, surgical procedure and outcome. A narrative review

BACKGROUND

Emergency Department Thoracotomy (EDRT) after traumatic Cardio-pulmonary Arrest (CPR) can be used to salvage select critically injured patients. Indications of this surgical procedure are widely debated and changed during last decades. We provide the available literature about EDRT in the effort to provide a comprehensive synthesis about the procedure, likelihood of success and patient's outcome in the different clinical setting, accepted indications and technical details adopted during the procedure for different trauma injuries.

METHODS

Literature from 1975 to 2020 was retrieved from multiple databases and reviewed. Indications, contraindications, total number and outcome of patients submitted to EDRT were primary endpoints.

RESULTS

A total number of 7236 patients received EDRT, but only 7.8% survived. Penetrating trauma and witnessed cardiopulmonary arrest with the presence of vital signs at the trauma center are the most favorable conditions to perform EDRT.

CONCLUSIONS

EDRT should be reserved for acute resuscitation of selected dying trauma patient. Risks of futility, costs, benefits of the surgical procedure should be carefully evaluated before performing the surgical procedure.

Penetrating cardiac injuries: A 36-year perspective at an urban, Level I trauma center

BACKGROUND

This study evaluates patterns of injuries and outcomes from penetrating cardiac injuries (PCIs) at Grady Memorial Hospital, an urban, Level I trauma center in Atlanta, Georgia, over 36 years.

METHODS

Patients sustaining PCIs were identified from the Trauma Registry of the American College of Surgeons and the Emory Department of Surgery database; data of patients who died prior to any therapy were excluded. Demographics and outcomes were compared over three time intervals: Period 1 (1975-1985; n = 113), Period 2 (1986-1996; n = 79), and Period 3 (2000-2010; n = 79).

RESULTS

Two hundred seventy-one patients (86% were male; mean age, 33 years; initial base deficit = -11.3 mEq/L) sustained cardiac stab (SW, 60%) or gunshot wounds (GSW, 40%). Emergency department thoracotomy was performed in 67 (25%) of 271 patients. Overall mortality increased in the modern era (Period 1, 27%, vs. Period 2, 22%, vs. Period 3, 42%; p = 0.03) along with GSW mechanisms (Period 1, 32%, vs. Period 2, 33%, vs. Period 3, 57%; p = 0.001), GSW mortality (Period 1, 36%, vs. Period 2, 42%, vs. Period 3, 56%; p = 0.04), and multichamber injuries (Period 1, 12%, vs. Period 2, 10%, vs. Period 3, 34%; p< 0.001). In Period 3, GSWs (n = 45) resulted in multichamber injuries in 28 patients (62%) and multicavity injuries in 19 patients (42%). Surgeon-performed ultrasound accurately identified pericardial blood in 55 of 55 patients in Period 3.

CONCLUSIONS

Increased frequency of GSWs in the past decade is associated with increased overall mortality, multichamber injuries, and multicavity injuries. Ultrasound is sensitive for detection of PCI.

LEVEL OF EVIDENCE

Therapeutic study, level IV; epidemioligc study, level III.

Evolving Challenges in Prehospital Trauma Services: Current Issues and Suggested Evaluation Tools

For the past two decades, prehospital trauma care has been addressed almost generically in terms of the related approaches to epidemiology, research, and management. However, evolving directions in research have helped emergency medical services (EMS) practitioners to delineate more focused treatment strategies according to the mechanism of injury, anatomic involvement, and the patient's clinical condition. Recent studies in the areas of trauma-associated circulatory arrest, severe blunt head injury, and post-traumatic hemorrhage following penetrating truncal injury suggest that current standard approaches to patient care should be reconsidered. In turn, this need for re-examination of trauma management strategies calls for the development of appropriate evaluation tools within EMS systems. Proper research design is dependent upon several key issues including: 1) the type of study (system study versus examination of a specific intervention); 2), the population under study; 3) physiological and anatomical scoring method; 4) prospective definitions of interventions and meaningful outcome variables (both morbidity and mortality; 5) relative outcome compared to known standards; and 6) prospective determination of statistical requirements.

Factors affecting mortality after penetrating cardiac injuries: 10-year experience at urban level I trauma center

BACKGROUND

Despite the lethality of injuries to the heart, optimizing factors that impact mortality for victims that do survive to reach the hospital is critical.

METHODS

From 2003 to 2012, prehospital data, injury characteristics, and clinical patient factors were analyzed for victims with penetrating cardiac injuries (PCIs) at an urban, level I trauma center.

RESULTS

Over the 10-year study, 80 PCI patients survived to reach the hospital. Of the 21 factors analyzed, prehospital cardiopulmonary resuscitation (odds ratio [OR] = 30), scene time greater than 10 minutes (OR = 58), resuscitative thoracotomy (OR = 19), and massive left hemothorax (OR = 15) had the greatest impact on mortality. Cardiac tamponade physiology demonstrated a "protective" effect for survivors to the hospital (OR = .08).

CONCLUSIONS

Trauma surgeons can improve mortality after PCI by minimizing time to the operating room for early control of hemorrhage. In PCI patients, tamponade may provide a physiologic advantage (lower mortality) compared to exsanguination.

Cardiac trauma

The first description of a cardiac injury is found in The Iliad. Cardiac injuries are one of the most challenging injuries, requiring immediate surgical intervention, excellent surgical skills and critical care. The clinical presentation of penetrating cardiac injuries has a broad range, from haemodynamic stability to cardio-pulmonary arrest. Two-dimensional echocardiography is now the procedure of choice over subxiphoid pericardial window to evaluate for the presence of these injuries. Emergency department thoracotomy is indicated for management of penetrating cardiac injuries with immediate cardiography, aortic cross-clamping and open cardiac massage. The left anterolateral thoracotomy is the incision of choice for patients that arrive in extremis. The repair of the wounds should be performed according to the anatomy of the injured area. Mortality remains high, although better patient selection according to physiologic scoring leads to increase in survival.

An evidence-based approach to patient selection for emergency department thoracotomy: A practice management guideline from the Eastern Association for the Surgery of Trauma

BACKGROUND

Within the GRADE (Grading of Recommendations Assessment, Development and Evaluation) framework, we performed a systematic review and developed evidence-based recommendations to answer the following PICO (Population, Intervention, Comparator, Outcomes) question: should patients who present pulseless after critical injuries (with and without signs of life after penetrating thoracic, extrathoracic, or blunt injuries) undergo emergency department thoracotomy (EDT) (vs. resuscitation without EDT) to improve survival and neurologically intact survival?

METHODS

All patients who underwent EDT were included while those involving either prehospital resuscitative thoracotomy or operating room thoracotomy were excluded. Quantitative synthesis via meta-analysis was not possible because no comparison or control group (i.e., survival or neurologically intact survival data for similar patients who did not undergo EDT) was available for the PICO questions of interest.

RESULTS

The 72 included studies provided 10,238 patients who underwent EDT. Patients presenting pulseless after penetrating thoracic injury had the most favorable EDT outcomes both with (survival, 182 [21.3%] of 853; neurologically intact survival, 53 [11.7%] of 454) and without (survival, 76 [8.3%] of 920; neurologically intact survival, 25 [3.9%] of 641) signs of life. In patients presenting pulseless after penetrating extrathoracic injury, EDT outcomes were more favorable with signs of life (survival, 25 [15.6%] of 160; neurologically intact survival, 14 [16.5%] of 85) than without (survival, 4 [2.9%] of 139; neurologically intact survival, 3 [5.0%] of 60). Outcomes after EDT in pulseless blunt injury patients were limited with signs of life (survival, 21 [4.6%] of 454; neurologically intact survival, 7 [2.4%] of 298) and dismal without signs of life (survival, 7 [0.7%] of 995; neurologically intact survival, 1 [0.1%] of 825).

CONCLUSION

We strongly recommend that patients who present pulseless with signs of life after penetrating thoracic injury undergo EDT. We conditionally recommend EDT for patients who present pulseless and have absent signs of life after penetrating thoracic injury, present or absent signs of life after penetrating extrathoracic injury, or present signs of life after blunt injury. Lastly, we conditionally recommend against EDT for pulseless patients without signs of life after blunt injury.

LEVEL OF EVIDENCE

Systematic review/guideline, level III.

[Surgical accesses to the major mediastinal vessels in thoracic trauma]

Trauma is the most common cause of death in the economically active population and thoracic trauma is directly or indirectly responsible for one quarter of these deaths. Lesions to the large thoracic vessels are associated with immediate or early death in the hospital setting. Patients admitted alive can be classified as stable or unstable. The access route to be elected for management of these veins will depend on this status, as well as on the anatomical particularities of the patient, which may require combined incisions for adequate access. This article provides a review and discussion of lesions to these structures as well as access routes to them.

Appropriate use of emergency department thoracotomy: implications for the thoracic surgeon

BACKGROUND

Practice guidelines for the appropriate use of emergency department thoracotomy (EDT) according to current national resuscitative guidelines have been developed by the American College of Surgeons Committee on Trauma (ACS-COT) and published. At an urban level I trauma center we analyzed how closely these guidelines were followed and their ability to predict mortality.

METHODS

Between January 2003 and July 2010, 120 patients with penetrating thoracic trauma underwent EDT at Mount Sinai Hospital (MSH). Patients were separated based on adherence (group 1, n=70) and nonadherence (group 2, n=50) to current resuscitative guidelines, and group survival rates were determined. These 2 groups were analyzed based on outcome to determine the effect of a strict policy of adherence on survival.

RESULTS

Of EDTs performed during the study period, 41.7% (50/120) were considered outside current guidelines. Patients in group 2 were less likely to have traditional predictors of survival. There were 6 survivors in group 1 (8.7%), all of whom were neurologically intact; there were no neurologically intact survivors in group 2 (p=0.04). The presence of a thoracic surgeon in the operating room (OR) was associated with increased survival (p=0.039).

CONCLUSIONS

A policy of strict adherence to EDT guidelines based on current national guidelines would have accounted for all potential survivors while avoiding the harmful exposure of health care personnel to blood-borne pathogens and the futile use of resources for trauma victims unable to benefit from them. Cardiothoracic surgeons should be familiar with current EDT guidelines because they are often asked to contribute their operative skills for those patients who survive to reach the OR.

Survival rates for adult trauma patients who require cardiopulmonary resuscitation

OBJECTIVES

To determine survival rates in adult trauma patients requiring cardiopulmonary resuscitation (CPR).

METHODS

We used 1992-2002 trauma registry data to identify all adult trauma patients over the age of 16 who required CPR in the pre-hospital setting or within 24 hours of arriving at the hospital. Demographic information, mechanism of injury, injury severity score (ISS), vital signs at the scene and in the hospital, and mortality were obtained from patient charts. Patients were stratified into 2 groups: those with absent vital signs in the field who required prehospital CPR, and those who lost vital signs within 24 hours of arriving at the trauma suite.

RESULTS

Of 50 eligible patients, 28 (58%) were male and 46 (92%) sustained blunt trauma. Mean age was 44.8 +/- 20 years and mean ISS was 38 +/- 18. Overall mortality was 96% (48/50), and all patients who required prehospital CPR died. The only 2 survivors were patients who arrived with vital signs and developed pulseless electrical activity while in the trauma suite.

CONCLUSION

In this consecutive series of trauma victims with cardiopulmonary arrest there were no survivors among those who lost vital signs and required CPR prior to arriving at the hospital.

Emergency department thoracotomy for penetrating injuries of the heart and great vessels: an appraisal of 283 consecutive cases from two urban trauma centers

BACKGROUND

Historically, patients with penetrating cardiac injuries have enjoyed the best survival after emergency department thoracotomy (EDT), but further examination of these series reveals a preponderance of cardiac stab wound (SW) survivors with only sporadic cardiac gunshot wound (GSW) survivors. Our primary study objective was to determine which patients requiring EDT for penetrating cardiac or great vessel (CGV) injury are salvageable.

METHODS

All patients who underwent EDT for penetrating CGV injuries in two urban, level I trauma centers during 2000 to 2007 were retrospectively reviewed. Demographics, injury (mechanism, anatomic injury), prehospital care, and physiology (signs of life [SOL], vital signs, and cardiac rhythm) were analyzed with respect to hospital survival.

RESULTS

The study population (n = 283) comprised young (mean age, 27.1 years +/- 10.1 years) men (96.1%) injured by gunshot (GSW, 88.3%) or SWs (11.7%). Patients were compared by injury mechanism and number of CGV wounds with respect to survival (SW, 24.2%; GSW, 2.8%; p < 0.001; single, 9.5%; multiple, 1.4%; p = 0.003). Three predictors-injury mechanism, ED SOL, and number of CGV wounds-were then analyzed alone and in combination with respect to hospital survival. Only one patient (0.8%) with multiple CGV GSW survived EDT.

CONCLUSION

When the cumulative impact of penetrating injury mechanism, ED SOL, and number of CGV wounds was analyzed together, we established that those sustaining multiple CGV GSWs (regardless of ED SOL) were nearly unsalvageable. These results indicate that when multiple CGV GSWs are encountered after EDT, further resuscitative efforts may be terminated without limiting the opportunity for survival.

Penetrating cardiac wounds: principles for surgical management

Stab wounds are the main type of penetrating cardiac injury in China and they have a fairly good prognosis when the patient receives expeditious and appropriate management. The objective of this study is to present the experience of managing the patients with penetrating cardiac injuries. A retrospective study involving 82 cases with penetrating wounds of the heart in the past 16 years was carried out. Stab wounds accounted for 86.58% of this series (71 of 82 patients). All 82 cases were treated operatively. The amount of preoperative infusion as fluid resuscitation for shock was less than 1,000 ml in 65.85% of the present study. Only in three patients was preoperative pericardiocentesis performed, yielding a false-negative result in one. Six patients sustaining cardiac arrest soon after arrival were subjected to emergency room thoracotomy (ERT), and five of them survived. The overall survival rate was 96.34%. One patient died of exsanguination due to injury of multiple chambers; of the remaining 2 deaths after operation 1 was associated with abdominal injuries and the other with failure of cerebral resuscitation. From the experience reported in this study, early establishment of diagnosis and prompt thoracotomy against time are the fundamental factors affecting the outcome of penetrating cardiac injuries. Preoperative massive transfusion and pericardiocentesis are not advocated.

Trauma to cardiac valves

Cardiorrhaphy is a relatively common procedure performed in a trauma center. However, there is a subgroup of patients with more complicated cardiac injuries such as coronary artery injuries, septal defects, and valvular injuries. Cardiac valvular injuries are often diagnosed subacutely when a new murmur is heard. Transesophageal echocardiography has been increasingly performed to diagnosis these injuries and may be helpful intraoperatively. Cardiac catheterization may be indicated in selected patients. Techniques to address these injuries may involve repair or prosthetic replacement. A high index of suspicion is needed to diagnose these relatively rare injuries.

Survival after emergency department thoracotomy: review of published data from the past 25 years

BACKGROUND

Emergency department thoracotomy (EDT) has become standard therapy for patients who acutely arrest after injury. Patient selection is vitally important to achieve optimal outcomes without wasting valuable resources. The aim of this study was to determine the main factors that most influence survival after EDT.

STUDY DESIGN

Twenty-four studies that included 4,620 cases from institutions that reported EDT for both blunt and penetrating trauma during the past 25 years were reviewed. The primary outcomes analyzed were in-hospital survival rates.

RESULTS

EDT had an overall survival rate of 7.4%. Normal neurologic outcomes were noted in 92.4% of surviving patients. Factors reported as influencing outcomes were the mechanism of injury (MOI), location of major injury (LOMI), and signs of life (SOL). Survival rates for MOI were 8.8% for penetrating injuries and 1.4% for blunt injuries. When penetrating injuries were further separated, the survival rates were 16.8% for stab wounds and 4.3% for gunshot wounds. For the LOMI, survival rates were 10.7% for thoracic injuries, 4.5% for abdominal injuries, and 0.7% for multiple injuries. If the LOMI was the heart, the survival rate was the highest at 19.4%. The third factor influencing outcomes was SOL. If SOL were present on arrival at the hospital, survival rate was 11.5% in contrast to 2.6% if none were present. SOL present during transport resulted in a survival rate of 8.9%. Absence of SOL in the field yielded a survival rate of 1.2%. There was no clear single independent preoperative factor that could uniformly predict death.

CONCLUSIONS

The best survival results are seen in patients who undergo EDT for thoracic stab injuries and who arrive with SOL in the emergency department. All three factors-MOI, LOMI, and SOL-should be taken into account when deciding whether to perform EDT. Uniform reporting guidelines are needed to further elucidate the role of EDT taking into account the combination of MOI, LOMI, and SOL.

Advances in the diagnosis and treatment of thoracic trauma

With the exception of the use of ECG to screen patients for blunt cardiac injury, recent advances in the diagnosis of thoracic trauma involve new technology. Use of surgeon-performed pericardial and pleural ultrasound for the detection of tamponade or hemothorax, TEE or spiral CT to diagnose rupture of the thoracic aorta, and thoracoscopy to evaluate a hemothorax or the integrity of the left hemidiaphragm are all standard techniques in modern trauma centers. In terms of treatment, emergency center thoracotomy is performed more selectively and with the adjunct of staple closure for cardiac wounds. Pulmonotomy is used selectively to control deep lobar hemorrhage and to avoid the need for an emergent lobectomy. Finally, nonoperative management of an intimal tear of the thoracic aorta or delayed operative management of a full-thickness tear in the patient with multiple injuries, using beta-blocker-induced relative hypotension, is rapidly becoming the standard of care throughout the United States.

Penetrating Cardiac Trauma at an Urban Trauma Center: A 22-Year Perspective

This is a report of a 22-year experience with penetrating cardiac trauma at a single urban Level I trauma center. We conducted a retrospective chart review supplemented by computerized patient log. Comparisons of mortality between Period 1 (1975–1985; 113 patients) and Period 2 (1986–1996; 79 patients) were by χ2 or Fisher's exact tests. Statistical significance was defined as P ≤ 0.05. From 1975 to 1996, 192 patients (mean age, 32 years; 88% male) with penetrating cardiac stab wounds (68%) or gunshot wounds (32%) were treated. The most common initial clinical presentation was cardiac tamponade, and most patients (54%) were hypotensive (systolic blood pressure 30–90 mm Hg). The most common initial intervention in the emergency center was tube thoracostomy. The use of pericardiocentesis as a diagnostic and therapeutic modality in the emergency center virtually disappeared in Period 2, as compared with Period 1. Since 1994, surgeon-performed cardiac ultrasound has been performed and has correctly diagnosed hemopericardium in 12 patients (100% survival). The overall mortality for all patients during the 22-year study interval was 25 per cent and was not significantly different between Period 1 (27%) and Period 2 (22%). The mortality associated with gunshot wounds was increased compared with that of stab wounds. Similarly, mortality for patients who arrested in the emergency center was increased compared with those patients who did not arrest. We conclude: 1) cardiac tamponade is the most common presentation in patients with cardiac wounds; 2) pericardiocentesis in the emergency center has essentially disappeared; 3) surgeon-performed ultrasound of the pericardium should improve survival of future patients who are normotensive or mildly hypotensive; 4) over the last 11 years, there has been a substantial decrease in mortality in patients with stab wounds and a statistically significant decrease in arrested patients; and 5) overall mortality for penetrating cardiac trauma has not changed during the 22-year interval.

Outcome assessment of physiologic and clinical predictors of survival in patients after traumatic injury with a trauma score less than 5

OBJECTIVE

To define those physiologic and clinical variables that have a positive or negative predictive value in discriminating survivors from nonsurvivors with traumatic injuries and a Trauma Score of 5 or less.

METHODS

A retrospective review of 2,622 trauma patients transported by an air medical service from the scene of injury to a Level I trauma center was performed. Demographic, physiologic, and clinical variables were evaluated.

RESULTS

One hundred thirty-six patients were studied; 14 patients survived trauma resuscitation. Survivors had statistically significant improvement in the Glasgow Coma Scale from the field to arrival in the emergency room. Revised Trauma Score, probability of survival, pulse, respiratory rate, cardiac rhythm, central nervous system activity, and signs of life were statistically more favorable in survivors.

CONCLUSION

In patients who survived to discharge, signs of central nervous system activity in the field was a positive predictor of survival, and severe head injury served as a negative predictor of survival.

Acute management of complex cardiac injuries

BACKGROUND

Injury to the heart has been studied extensively. However, a small group of patients with injuries to the coronary arteries or intracardiac structures may require a different operative approach.

METHODS

Retrospective review of a cardiovascular injury database.

RESULTS

Over a 20-year period, 711 cardiac injuries were treated. The mean age of the victims was 31.1 (90% men). Causes were primarily stab wounds (54%) and gunshot wounds (42%). Cardiac chambers injured included the right ventricle (40%), left ventricle (40%), right atrium (24%), and left atrium (3%). The overall mortality was 47%. Sixty complex injuries occurred. Of 21 left anterior descending coronary artery injuries (76.2% mortality), two patients presented with sufficient signs of life to warrant emergent coronary artery bypass (mortality 50%). There were seven circumflex/obtuse marginal coronary artery injuries, all treated with ligation (mortality 71.4%). Eight right/posterior descending coronary artery injuries (mortality 62.5%) were seen, and all but one were treated with ligation. The one patient not treated with ligation underwent coronary bypass and died. Delayed mitral valve replacement was performed for two valvular injuries (mitral). There were a total of 14 intracardiac fistulas (mortality 35.7%). All six of the surviving patients with ventricular septal defect required reoperation.

CONCLUSION

The mortality for complex injuries (coronary, septal, valvular) was 53%. This group was a specific population that self-selected by surviving to operation. Acute operations for complex injuries (beyond cardiorrhaphy) were primarily heroic life-saving efforts. Reoperation for cardiac injuries was most common for septal or valvular injuries. Only 2% of all survivors required reoperation to correct a residual defect.

Comparison of staples and sutures for cardiorrhaphy in traumatic puncture wounds of the heart

The purpose of this study was to compare the traditional method for repair of cardiac lacerations using sutures and pledgets (S/P) with repair using a skin stapling device (SSD) performed by emergency medicine residents. In a prospective, randomized, non-blinded animal study, 20 anesthetized mongrel dogs were instrumented and underwent left lateral thoracotomy, pericardiotomy, and cardiac exposure. In set 1, a standardized 8-mm right ventricular stab wound was made with a #10 scalpel; emergency medicine residents then immediately performed emergent cardiorrhaphy by either S/P (n = 5) or SSD (n = 5) technique. In set 2, 10 dogs received standardized 8-mm right ventricular stab wounds followed by repair and then received a second stab wound to the same right ventricle that was subsequently repaired by the same operator using the alternate technique. All dogs were observed for 60 min for gross blood loss, hemodynamic instability, and integrity of repair. The results demonstrate that SSD cardiorrhaphy was significantly faster (29 +/- 11 sec in set 1; 14 +/- 6 sec in set 2) than S/P repair (201 +/- 10 sec in set 1; 196 +/- 59 sec in set 2). No appreciable differences in blood loss or repair integrity were noted in either group. Two operators in the S/P group suffered needle puncture injuries. In conclusion, cardiorrhaphy by SSD is faster to perform, has similar repair integrity, and has less risk of accidental contaminated needle injury than does traditional S/P repair when performed by emergency medicine residents.

Penetrating cardiac injuries

Penetrating cardiac injuries pose a tremendous challenge to any trauma surgeon. Time, sound judgment, aggressive intervention, and surgical technique are the most important factors contributing to positive outcomes. This article extensively reviews the history, surgical management, and techniques needed to deal with these critical injuries. This year commemorates the one hundredth anniversary of the first successful repair of a cardiac injury.

Evaluation of subxiphoid pericardial window used in the detection of occult cardiac injury

We critically evaluated several diagnostic modalities (clinical criteria, subxiphoid pericardial window (SPW) and laparoscopy) used in the detection of occult cardiac injury in haemodynamically stable patients at high risk of cardiac injury. Over 5 years, 122 patients were admitted to a Level I trauma centre with such an injury. They sustained 69 stab wounds, and 53 gunshot wounds. Sites of penetration were: precordial (81), right chest (25), lateral chest (13), thoracoabdominal (40) and abdominal (19). Vital signs in the emergency room were (mean +/- SD): systolic BP, 111 +/- 23.2 mmHg; HR, 106 +/- 18.7; GCS, 13.6 +/- 1.3; and CVP, 17 +/- 7.8 cmH2O. SPW was performed in all patients and was positive for haemopericardium in 26 patients, 24 (92 per cent) of whom had a cardiac injury at operation. Two patients had pericardial lacerations without cardiac injury. In addition, 14 patients with lower precordial and thoracoabdominal wounds underwent laparoscopy. At laparoscopy, the pericardium was evaluated by transdiaphragmatic inspection in 10 patients. The presence (two) or absence (eight) of blood within the pericardium was accurately predicted and verified by SPW. Univariate and multiple logistic regression analysis of clinical data failed to reveal any significant predictor of cardiac injury. SPW remains the standard means of diagnosing occult cardiac injury in high-risk patients. Since the incidence of occult cardiac injury in haemodynamically stable patients is 20 per cent, SPW should be used liberally. Laparoscopy may have a role in evaluating the pericardium in the subgroup of patients with lower chest wounds, and it facilitates inspection of intra-abdominal viscera and diaphragm at the same time.

Penetrating cardiac injuries: clinical classification and management strategy

The management of penetrating cardiac injury is controversial. To facilitate decision making, a simple clinical classification of patients with such an injury is proposed. Five categories are considered: (1) lifeless, (2) critically unstable, (3) cardiac tamponade, (4) thoracoabdominal injury and (5) benign presentation. Investigation, if indicated, and the timing and setting of surgical intervention are discussed for each category.

Penetrating cardiac injuries

One hundred nine penetrating cardiac injuries were reviewed: 49 gunshot wounds and 60 stab wounds. They were classified into four groups: group 1 (lifeless), 38; group 2 (agonal), 16; group 3 (shock), 33; and group 4 (stable), 22. Thirty-six patients in group 1 (94%) and 8 of 16 patients in group 2 (50%) underwent emergency room thoracotomy; 24 of 33 in group 3 (73%) and 20 of 22 (90%) underwent thoracotomy in the operating room. Twenty-one (38%) of 55 patients undergoing emergency room thoracotomy survived, whereas 47 (87%) of 54 patients undergoing operating room thoracotomy survived. Survival was 12 of 38 (31%) in group 1, 11 of 16 (69%) in group 2, 26 of 33 (79%) in group 3, and 18 of 22 (82%) in group 4 with an overall survival of 67 of 109 (61%). Gunshot wounds of the heart portend a worse prognosis than stab wounds. Survival of gunshot wounds was 20 of 49 (40%) compared with 47 survivors of 60 stab wounds (78%). Aggressive treatment, including emergency room thoracotomy, is justified for lifeless and deteriorating cardiac injury victims.

Should emergency room thoracotomy be reserved for cases of cardiac tamponade?

Forty-five trauma cases underwent emergency room thoracotomy (ERT) for circulatory collapse or cardiac arrest in the resuscitation area. There were no survivors in the blunt injury group (13 cases). In the penetrating group (32 cases) the overall survival was 25 per cent, with seven out of eight survivors having cardiac tamponade. Although ERT gives good results only for cardiac tamponade, not all cases of tamponade are clinically obvious on admission. The authors recommend that ERT be done on all cases of collapse or arrest following penetrating chest injury where signs of life have been present within the previous 3 min.

Penetrating wounds to the heart: a wartime experience

Forty-nine war casualties with penetrating cardiac wounds were treated at the Hôtel-Dieu de France University Hospital between April 1975 and December 1987. All the wounds were caused by high-velocity missiles. An aggressive approach was utilized. Emergency room thoracotomy was performed in 17 "lifeless" patients, 4 of whom survived. Twenty-seven of the 32 patients who were in stable enough condition to undergo initial repair in the operating room survived. Overall survival was 63% (31/49). No intracardiac injuries were diagnosed in survivors, and no cardiac reoperations were required. Careful analysis of the trajectory of the missile or missiles and a portable chest roentgenogram were the most important factors for diagnosing a penetrating wound to the heart and for predicting potential associated injuries.

The injured heart

Penetrating and blunt injuries to the heart, ranging from cardiac concussion to rupture, are seen more and more frequently. Prompt diagnosis because of a high index of suspicion and timely, well-executed resuscitative efforts are rewarded by remarkable survival rates, even in the patients presenting in extremis, whereas hesitancy in diagnosis and therapeutic action militates against a successful result.

Indications for thoracotomy: deciding to operate

Formal chest operations other than minor procedures are required by only 12 to 15 per cent of patients with thoracic trauma. For those patients requiring thoracotomy, the operation may be required acutely or on a delayed basis. Acute thoracotomy may be necessary urgently, but in most situations, it is performed after a systematic evaluation has revealed specific symptoms and proved injuries. Some conditions should NOT lead automatically to thoracotomy unless other indications for the operation are present. In some cases, thoracotomy is required on a delayed basis.

Emergency department thoracotomy for trauma: a collective review

A decade of experience with resuscitative thoracotomy for the trauma victim in extremis has been gained since the pioneering efforts of Mattox and his associates in 1974. It appears, from a review of the various reports from different trauma centers, that there is an emergence of a consensus as to the best indications for the procedure. It is generally agreed upon that ERT is fruitless in the patient with severe head trauma or when vital signs were absent at the scene of the injury. In the absence of penetrating thoracic injuries ERT yields a very poor survival in patients without vital signs on admission to the emergency center. It is widely accepted that the best results for ERT are in patients with cardiac tamponade. The prognosis is hopeless in patients without vital signs after sustaining blunt trauma.

Penetrating cardiac trauma. Quantifying the severity of anatomic and physiologic injury

A method of quantifying the anatomic extent of injury to the heart, Penetrating Cardiac Trauma Index, (PCTI) and other thoracic organs has been proposed. The total extent of thoracic injury, Penetrating Thoracic Trauma Index (PTTI), was measured. When associated abdominal injury was present, it was assessed by the Penetrating Abdominal Trauma Index (PATI) of Moore et al. The severity of total injury sustained by the patient, represented by the Penetrating Trauma Index (PTI), was determined by the sum total of these scores. The extent of physiologic abnormality induced by cardiac penetration, (Physiologic Index or PI), was graded on a scale of increasing severity from 5-20 based on the vital signs of patients on admission. Analysis of 112 patients with penetrating cardiac injuries (1973-1983) revealed that the indices, PCTI and PI, showed an excellent correlation with survival (R2 = 0.827 and 0.928, respectively) as did the total extent of trauma (PTI). A composite prognostic score of the sum of PI and PTI demonstrated a significant separation of survivors from nonsurvivors (p less than 0.001). It is concluded that these anatomic (PCTI and PTI) and physiologic (PI) indices are valid and, with additional confirmation, may provide an objective method of evaluating penetrating cardiac injuries.

Liberal use of emergency center thoracotomy

Emergency center thoracotomy is a heroic technique of resuscitation and treatment which was revived in the 1960s to improve the survival of patients presenting with cardiac wounds. With excellent survival rates attained in such patients, the technique was extended to victims of trauma with other mechanisms and locations of injury. At present, the technique has a survival rate ranging from 3 to 20 percent; however, most recent series of unselected patients show a survival rate of 8 to 10 percent. In this series, there were no survivors when emergency center thoracotomy was utilized after a period of prehospital cardiopulmonary resuscitation. Patients with isolated stab wounds to the thorax, especially those with cardiac injuries, had the best survival rate of any subgroup in the series. If emergency center thoracotomy was utilized for patients with some vital signs on admission and with neck or truncal gunshot wounds, blunt trauma, or abdominal trauma, the survival rate decreased to 2 to 4 percent; however, the small but constant survival rate in all of these groups justifies its continued use.

Emergency department thoracotomy for penetrating injuries: predictive value of patient classification

In 18 months, 44 patients underwent thoracotomy in an emergency department (ED) for penetrating thoracic injuries. Of 14 patients resuscitated, seven (50%) survived, and all were neurologically intact. Patients were classified according to the quality of signs of life in transit or upon arrival at the ED. Identical survival rates of 29% were noted for patients in Group I (profound shock) and in Group II (agonal), with survival at 14% for individuals in Group III ("dead" on arrival). There were no survivors among patients in Group IV ("dead" on the scene), and ED thoracotomy, in the authors' opinion, is fruitless in this group. In Groups I, II, and III, total salvage from cardiac injuries was six of 24 patients (25%), and for those with non-cardiac injuries, it was one of 11 (9%). The rate of survival from cardiac stab wounds in Groups I, II, and III, was five of 16 (31%) and one of eight (13%) for gunshot wounds. Five of the seven survivors (71%) arrived at the ED by rapid transport without the benefit of any pre-hospital life support. Patient classification appears to be a valuable tool in evaluating the benefit of ED thoracotomy. The neurological status of all survivors and pertinent transportation data should be included in all future studies of ED thoracotomy. "Scoop and run" in the urban setting with rapid transport capability may be superior to pre-hospital stabilization of victims of penetrating thoracic trauma.

Cardiac wounds. Experience with 70 patients

This study represents the personal experience of a general surgeon in 70 cases of penetrating injuries of the heart. Eighteen patients with no signs of life on admission were subjected to a thoracotomy on the stretcher with a mortality of 94%. Fifty-two patients were operated on in the operating theater with a mortality of 13.5%. Beck's triad (low blood pressure, raised central venous pressure, and distant cardiac sounds) was recorded in 77% of the cases with proven tamponade, but pulsus paradoxus in only 11%. In the author's opinion, percardiocentesis has no place in the diagnosis or treatment of cardiac injuries. Particular attention has been paid to the management of coronary artery injuries and the high incidence of air embolism in certain patients.

Management of penetrating cardiac injuries: the role of emergency room thoracotomy

Sixty-four consecutive patients with penetrating cardiac injuries were treated between January, 1977, and January, 1983, at the University of Maryland Hospital. Twenty-eight patients had major associated injuries of other organs. The patients were divided into groups according to their clinical status on arrival. An aggressive approach was utilized including early emergency room (ER) thoracotomy for "lifeless" or deteriorating patients. Three patients required immediate cardiopulmonary bypass for repair of their injuries. Twenty-one (57%) of the 37 patients undergoing ER thoracotomy survived; most of the deaths occurred in patients arriving "lifeless" from gunshot wounds. Twenty-four (89%) of the 27 patients who were in stable enough condition to undergo initial repair in the operating room (OR) survived. Overall survival was 45 patients (70%). Though superficial wound infections developed in 18 patients, there were no deep or systemic infections. None of the survivors sustained severe neurological sequelae. Five patients underwent late reoperations for closure of a ventricular septal defect (2), mitral valve replacement (1), and pericardiectomy (2) with no deaths. Though repair of penetrating cardiac injuries should preferably be carried out in the OR, immediate thoracotomy for "lifeless" or deteriorating patients can be performed in the ER with a low incidence of direct surgical complications and with high patient survival.