Petr Hejna

Petr Hejna
Charles University in Prague | CUNI · Department of Forensic Medicine (Hradec Králové)

MD, PhD, MBA

About

129
Publications
507,698
Reads
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999
Citations
Citations since 2016
36 Research Items
751 Citations
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Introduction
As a forensic pathologist, I am interested mainly in the morphology of gunshot wounds, morphological findings in asphyxial fatalities, and low temperature-related deaths. My other major fields of interest include forensic cardiac pathology, forensic anthropology, scientific photography and its application in forensic medicine.
Additional affiliations
May 2013 - present
Position
  • Wireless tethering of digital images at autopsy room
May 2010 - present
Position
  • Usage of UV and IR photography in forensic medicine
January 2009 - December 2012
Education
January 2010 - June 2012
The Centre of Law Studies
Field of study
September 2004 - August 2009
Charles University in Prague
Field of study
  • Pathology
September 1997 - June 2003
Charles University in Prague
Field of study
  • General medicine

Publications

Publications (129)
Article
The muzzle imprint mark characteristically associated with contact or near contact entrance gunshot wounds exemplifies one of the most informative external findings in forensic medical practice. The presence of the muzzle imprint mark on the body’s surface proves ballistic trauma, point of entry, and range of fire. Moreover, its appearance and conf...
Article
Forensic medicine is a multidisciplinary medical field that cooperates with a number of complementary medical disciplines and receives knowledge from many other non-medical disciplines. Cooperation with forensic toxicologists and forensic radiologists is routine in forensic practice, as well as with traffic engineers, forensic ballistics, forensic...
Article
Full-text available
We describe the case of a 36-year-old male who presented to hospital with acute respiratory distress, and hemoptysis after intravenously injecting 20 milliliters of pure gasoline. Despite maximum supportive care he died without a definitive diagnosis 4 hours after presentation to the hospital. Postmortem examination confirmed diffuse pulmonary hemo...
Article
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Autoerotic deaths refer to fatalities occurring during individual, solitary sexual activity, in which some device, situation, or act is used to gain or boost the sexual arousal of the subject. Anorectal autoeroticism is an autoerotic paraphilic activity that pertains to the self-insertion of various objects into the anal canal and rectal cavity to...
Article
Serious intrapartum fetal injuries are unfortunate events that confer severe consequences on medical personnel. Most birth traumas are noncritical and resolve for a few days. Permanent effects or fatal outcomes occur infrequently. We report an unusual case of intrapartum complete fetal decapitation. The labor was complicated by shoulder dystocia, w...
Article
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Postmortem computer tomography (CT) came into practice of forensic medicine in the 1990s and has later been complemented with magnetic resonance imaging (MRI). A pioneer virtual autopsy was conducted in Germany in 1983. In the Czech Republic, this examination was first performed in 1993. A typical examination requires about 30 min, with the most re...
Article
Background The lack of effective biomarkers for the screening and early detection of ovarian cancer (OC) is one of the most pressing problems in oncogynecology. Because epigenetic alterations occur early in the cancer development, they provide great potential to serve as such biomarkers. In our study, we investigated a potential of a four-gene meth...
Article
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Geocaching is a high-tech treasure-hunt game that uses GPS-enabled devices or smartphone apps to find cleverly hidden treasures marked by GPS coordinates that are shared online. Like any other outdoor activity, geocaching is associated with risks of falls, environmental injuries, asphyxia and natural events. Despite the apparent risk of serious inj...
Article
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Examination of a person who has been a victim of a physical or sexual assault may be very important for upcoming legal proceedings. In the context of a clinical forensic examination, physical findings are recorded and biological trace material is gathered and secured. Ideally, all forensic findings are documented in a detailed report combined with...
Article
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The concept of spontaneous combustion has huge appeal as an historical fiction but it has no scientific background. However, in some deaths involving fire, a body can burn away virtually completely with minimal thermal destruction to the neighboring environment. We report an extraordinary case of the self-immolation of an elderly woman who set hers...
Article
Multiple sclerosis, currently incurable and potentially profoundly disabling demyelinating central nervous system disease, is associated with higher occurrence of suicide as affected individuals are prone to major depression and psychosis. Despite progressively incapacitating neurologic impairment, well-staffed institutions, and limited repertoire...
Article
Blank firing guns are readily accessible in most countries due to an absence of legal regulations. These weapons are capable of causing lethal injuries. We report a rare case of secondary (unplanned) complex suicide committed with a knife and blank cartridge pistol. A 59‐year‐old man was found dead with three superficial incisions in his neck and a...
Article
Laryngohyoid fractures in hanging victims are one of the most studied and paradoxically contradictory topics in forensic pathology. According to literary sources, the incidence of laryngohyoid fractures in hanging varies significantly, from 0% to 100%. To verify the diagnostic significance of these injuries in hanging, we prospectively and consecut...
Article
Strangulation of the heart appears to be an exceedingly rare mechanical phenomenon that can develop with epicardial pacing wires in individuals undergoing somatic growth. Over the passage of time, owing to size mismatch between a fixed wire length and dynamically growing heart, the epicardial wire may embed around the heart resulting in the progres...
Article
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Autopsy reports of 119 cyclists who died in two Czech regions between 1995 and 2013 as a result of traffic crashes were studied. In all the study cases, pathologists analyzed whether a helmet could have helped the cyclists survive the crash or not. The crash circumstances from the police reports were then evaluated. The results indicate that helmet...
Article
Over the last few years, advanced diagnostic methods have penetrated in the realm of forensic medicine in addition to standard autopsy techniques supported by traditional X-ray examination and macro-diagnostic laboratory tests. Despite the progress of imaging methods, the conventional autopsy has remained basic and essential diagnostic tool in fore...
Article
Full-text available
The postmortem diagnosis of hypothermia remains problematic even in the era of molecular and digital diagnostic advances. Gross hemorrhages in iliopsoas muscles have been regarded as a helpful diagnostic sign in hypothermia fatalities; nevertheless, they have received marginal attention since their original description. The present study attempts t...
Article
Endocan is a soluble molecule secreted from vascular endothelial cells of various organs. Its exact function in humans remains to be elucidated, though it has been postulated that increased tissue expression or serum levels of this molecule may be an indicator of endothelial activation and neovascularization. In the realm of forensic pathology, stu...
Article
Objective: Though carbon monoxide (CO) poisonings account currently for a relatively small percentage of total non-natural deaths in Europe, they represent a serious public health burden and significant component of avoidable mortality in many countries. Our aim was to investigate long-term trends and to determine epidemiologic characteristics of...
Article
The aim of the present study is to investigate incidence and seriousness of CPR-associated injuries on a cohort of CPR non-survivors after out-of-hospital cardiac arrest in the Moravian-Silesian region. In total, 80 persons were included in the study within the study period (2012 - 2015). CPR-associated injuries were identified in 75 (93.7 %) perso...
Article
Postmortem increase in body core temperature is a well-known phenomenon in forensic practice. Despite this, cases of reliably documented postmortem hyperthermia are rarely reported in the forensic literature, and it is still not clear how frequently postmortem hyperthermia occurs and in which cases we may it predict. In routine forensic practice, t...
Article
Full-text available
Sharp weapons have been one of the most common deadly tools in cases of homicide and suicide for a long time. Tentative incisions accompany the majority of suicides by sharp force and the absence of hesitation marks provokes questions about the manner of death. We present the bizarre fatality of a 41-year-old male with an isolated circumscribed inc...
Article
Multiple giant aneurysms involving the coronary arteries are uncommon and rarely reported. In the presented case, a 63-year-old man with poorly controlled hypertension died suddenly. Gross autopsy examination showed multiple giant thrombus-filled coronary artery aneurysms, atherosclerotic coronary artery disease, and cardiomegaly. Histological sect...
Article
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Protrusion of the tongue is a common, though often neglected finding in fire fatalities. According to a study recently published by Bernitz et al., it is an indicator of vital burning. This statement has been doubted repeatedly. Retrospective analysis of 61 fire fatalities from our own autopsy material did not show any statistically significant inc...
Article
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The otoscopy is an examination of the external auditory canal, the eardrum, and the middle ear with an instrument called an otoscope. It is a simple, inexpensive, and time-saving endoscopic method typically used by general practitioners and otorhinolaryngologists. Authors present a prospective study of otoscopic findings investigated consecutively...
Article
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Purpose: The aim of this study was to assess the diagnostic value of catecholamines and their O-methylated metabolites in vitreous humor samples in identifying antemortem cold exposure and fatal hypothermia in the forensic casework. Methods: A total of 80 autopsy cases (40 hypothermia fatalities and 40 cases in which hypothermia as the main or c...
Article
Aim of the study: The aim of the study was to evaluate prevalence, seriousness and risk factors of intra-thoracic injuries (ITI) injuries associated with CPR in non-survivors after out-of-hospital cardiac arrest. Methods: This was a prospective forensic autopsy cohort study conducted in a single institution. Pathologists recorded autopsy data us...
Article
Fatalities attributed to powered circular saws appear to be vanishingly rare events with highly wounding and rapidly incapacitating effects. When they do occur, they are mainly self-inflicted in nature. We report the suicide committed by a 79-year-old man using a self-made circular table saw. Autopsy confirmed that the man received multiple heterog...
Article
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Forensic pathologists ought to take photographs of all important external and internal findings revealed at autopsy. Tethered photography offers a sophisticated strategy for direct visualization of captured images in an autopsy room, either wired or wirelessly, on larger screens (e.g., smartphones, tablets, monitors). It involves transmitting captu...
Conference Paper
Full-text available
In the field of forensic sciences, morphology of the hyoid bone provides important evidence on victim’s biological profile, e.g., sex, ancestry, age at death and on cause of death where various neck or head related injuries can be manifested as hyoid fractures. In regards to their mechanisms fractures of hyoids have been associated with accidental...
Article
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A 61-year-old woman diagnosed with an acute myo-cardial infarction (AMI), was submitted to urgent coronary angiography, revealing total occlusion of the right coronary artery. After stenting of the artery, however, the patient's clinical condition rapidly deteriorated within 24 h. Transthoracic echocardiography revealed a ventricular septal defect...
Article
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A 61-year-old woman diagnosed with an acute myo-cardial infarction (AMI), was submitted to urgent coronary angiography, revealing total occlusion of the right coronary artery. After stenting of the artery, however, the patient's clinical condition rapidly deteriorated within 24 h. Transthoracic echocardiography revealed a ventricular septal defect...
Article
Full-text available
Fatalities due to sharp force trauma, with respect to manner of death, may be homicidal, self-inflicted, or accidental in nature. This article presents a case of an unusual sharp force injury inflicted under very specific and seemingly obscured circumstances, initially suggestive of homicidal origin. A 69-year-old, socially isolated male was found...
Conference Paper
Full-text available
For the last few years several projects have invested into establishing image-guided postmortem examination in the framework of forensic pathology – utilizing either medical imaging technologies (CT, MRI) or optical surface scanning. Cross-sectional and surface data are both stand-alone techniques which bring a number of benefits but also few short...
Conference Paper
For the last few years several projects have invested into establishing image-guided postmortem examination in the framework of forensic pathology – utilizing either medical imaging technologies (CT, MRI) or optical surface scanning. Cross-sectional and surface data are both stand-alone techniques which bring a number of benefits but also few short...
Article
Full-text available
The purpose of this study was to assess the diagnostic potential of urinary metanephrines and 3-meth-oxytyramine compared to urinary catecholamine determi-nation in diagnosing antemortem cold exposure and fatal hypothermia. 83 cases of fatal hypothermia and 144 control cases were included in this study. Catecholamines (adren-aline, noradrenaline an...
Article
Full-text available
It is important that forensic pathologists are familiar with variations in the size and shape of the laryngohyoid complex when interpreting injuries and pathology of the head and neck region. Accurate postmortem examination of the laryngohyoid structures may be difficult if anatomical variation in these structures is present. Agenesis of the upper...
Article
In forensic assessment, denial and concealment of pregnancy has wide-ranging implications including criminal abortions, extramural deliveries, concealment of birth, newborn infant abandonment or even neonaticide. Clarification of whether a newborn was born alive is the most important factor when evaluating an abandoned neonate or concealment of bir...
Article
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We herein report an historical case of a fatal lion attack that took place in the Zoological Garden of Brno City, Czech Republic in 1973. Case outline The wounded body of a 20-year-old male junior zoo worker was found lifeless in a lion enclosure in the Zoo-logical Garden during the morning hours. The circum-stances indicated that a 300 kg male lio...
Article
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Despite the availability of modern imaging and molecular tools, traditional autopsy, and laboratory findings remain the gold standard for the diagnosis of drowning. This article presents two cases of freshwater drowning in which hemolytic staining of the endocardium of the left heart chambers was observed at autopsy. One case was a suicidal drownin...
Article
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Introduction: Therapeutic procedures performed during cardiopulmonary resuscitation on patients in cardiac arrest or unconsciousness from any other cause can have serious adverse effects. Scale of injuries scale is very wide - from simple skin lacerations up to serious injuries which can even thwart possibility of successful resuscitation and caus...
Article
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Acute aortic dissection is typically seen in the middle aged and elderly population, the majority of the cases are related to systemic hypertension and atherogenic process. In contrast, aortic dissection-related deaths in the young are rare and are mainly associated with genetically based disorders and congenital cardiac anomalies. One of the most...
Article
Full-text available
X-ray is the most common, basic and essential imaging method used in forensic medicine. It serves to display and localize the foreign objects in the body and helps to detect various traumatic and pathological changes. X-ray imaging is valuable in anthropological assessment of an individual. X-ray allows non-invasive evaluation of important findings...
Article
Full-text available
Morphological variation is a result of interplay among multiple intervening factors. For hyoid bones, the shape and size differences have been scarcely covered in the literature and in majority limited to studies of sexual dimorphism or age dependency. To our knowledge, the human hyoid bone, in complete opposite to other cranial bones, has not been...
Article
Full-text available
The identification of hypothermia as the cause of death has always been somewhat problematic in forensic pathology because of unspecific, inconstant, or even negative macroscopic and microscopic findings. Though the simultaneous presence of frost erythema, Wischnewski spots, hemorrhages into the synovial membrane, bloody discoloration of synovial f...
Article
Full-text available
X-ray is the most common, basic and essential imaging method used in forensic medicine. It serves to display and localize the foreign objects in the body and helps to detect various traumatic and pathological changes. X-ray imaging is valuable in anthropological assessment of an individual. X-ray allows non-invasive evaluation of important findings...
Article
Full-text available
This paper presents the most important historical facts about all forensic medicine workplaces in the Czech Republic since the beginning till present day, including a perspective on how to establish a new one. Each of the University Forensic Medicine Institutes or district Departments is covered by at least one author. The oldest institute is in Pr...
Article
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The hyoid bone is characterized by sexually dimorphic features, enabling it to occasionally be used in the sex determination aspect of establishing the biological profile in skeletal remains. Based on a sample of 298 fused and non-fused hyoid bones, the present paper compares several methodological approaches to sexing human hyoid bones in order to...
Article
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Case reportA 32-year-old woman collapsed suddenly in the early hours of the morning after visiting the toilet. Her partner made an emergency call immediately and started telephone-assisted cardiopulmonary resuscitation. Subsequent professional resuscitation efforts were unsuccessful, and the woman was pronounced dead at the scene. She was known to...
Article
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Case reportAn 89-year-old woman was found dead in the corridor of her apartment. A forensic autopsy was requested because her death was sudden and unexpected with an uncertain cause. The woman’s significant past medical history included chronic venous insufficiency of the lower limbs and ischemic heart disease.External examination showed small abra...
Article
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Unlabelled: It is a well-known fact that after drinking the same amount of alcohol, women show more signs of the effects of alcohol than men of the same weight. It seems that the main factors responsible for sex differences in alcohol metabolism and influence are the relatively lower amount of body water related to body fat in women than men and l...
Article
Full-text available
Frangible projectiles for firearms, which break apart on impact, are mainly used by law enforcement agencies for training purposes, but can also be used for police interventions. Apart from the usual absence of lead in the projectiles, the main advantage of using frangible projectiles is the reduced risk of ricochet after impact with a hard target....