{"id":36042,"date":"2024-06-05T12:28:34","date_gmt":"2024-06-05T10:28:34","guid":{"rendered":"https:\/\/petsvetcheck.de\/krankheiten-und-stoerungen\/hund\/arterio-venoese-fistel-im-bereich-der-haut-direkte-verbindung-zwischen-einer-arterie-und-einer-vene-im-bereich-der-haut\/"},"modified":"2026-08-16T17:21:15","modified_gmt":"2026-08-16T15:21:15","slug":"arteriovenous-fistula-in-the-skin-direct-connection-between-an-artery-and-a-vein-in-the-skin","status":"publish","type":"krankheit","link":"https:\/\/petsvetcheck.de\/en\/diseases-and-disorders\/dog\/arteriovenous-fistula-in-the-skin-direct-connection-between-an-artery-and-a-vein-in-the-skin\/","title":{"rendered":"Short-Circuit Connection Between Artery and Vein in Dogs (Arteriovenous Fistula)"},"content":{"rendered":"","protected":false},"featured_media":0,"template":"","krankheitsort":[143],"haufigkeit":[135],"organsystem_krankheiten":[226,208],"class_list":["post-36042","krankheit","type-krankheit","status-publish","hentry","krankheitsort-general-whole-body","haufigkeit-c-en","organsystem_krankheiten-cardiovascular-system","organsystem_krankheiten-skin","entry"],"acf":{"synonyme":"AV Fistula, Arteriovenous Shunt, AV Shunt","synonyme_en":"Cutaneous AV fistula, Peripheral arteriovenous malformation","titel_en":"Arteriovenous fistula of the skin","weitere_suchbegriffe":"","triage":"yellow","triage_begruendung":"Vascular malformation with swelling; early detection prevents bleeding risks.","definition":"An arteriovenous fistula in the skin area in dogs is an abnormal connection between an artery and a vein that leads to direct, unimpeded blood circulation between these two vessels without capillary passage.","ursachen":"In a dog's normal circulatory system, blood flows from the arteries through the capillaries to the veins. These capillaries are tiny blood vessels responsible for the exchange of oxygen, nutrients, and waste products between blood and tissue. An arteriovenous fistula bypasses this capillary bed process, leading to altered blood flow dynamics. \n\nArteriovenous fistulas can be congenital, meaning they are present at birth, or they can be acquired, often as a result of injuries, surgeries, or infections. In dogs, traumatic causes such as bite wounds or accidents are common triggers for the development of such fistulas. In some cases, surgical procedures or iatrogenic causes, such as incorrectly placed injections, may also be responsible. \n\nThe main problem with an arteriovenous fistula is that blood bypasses the normal resistance of the capillaries, leading to increased blood flow to the veins. This can result in elevated venous pressure and potentially overload the heart, as the heart must work harder to compensate for this uncontrolled blood flow. ","auswahl_symptome_rot":[33446,33668,33544,34003,33670,33186],"auswahl_symptome_blau":[33186,33628,33493,33958],"auswahl_symptome_grun":[34082,33933,34220,33782,34314],"erganzungen_zu_symptomen":"The symptoms of an arteriovenous fistula in dogs depend on the size and location of the fistula. Smaller fistulas may be asymptomatic and go undetected, while larger fistulas can cause visible and palpable changes in the skin. \n\nA common symptom is swelling or a pulsating area under the skin that may be warm and sometimes painful. Occasionally, a characteristic sound, known as a \"thrill,\" can be heard during auscultation with a stethoscope. The skin over the fistula may appear reddened or discolored, and there may be increased skin temperature. \n\nIn severe cases, when the fistula causes significant blood flow, systemic symptoms such as exhaustion, reduced exercise tolerance, or even heart problems may occur as the heart attempts to compensate for the increased blood flow.\n\nThe key sign is the combination of \"warm, pulsatile swelling + palpable vibration (thrill) + superficial vascular dilations (vascular ectasias).\"","zusammenfassung":"In dogs, an arteriovenous fistula can represent a direct connection between an artery and a vein, where blood bypasses the capillary network. This leads to altered blood flow dynamics and can strain the heart. Causes include congenital anomalies or injuries such as bite wounds. Symptoms may include swelling, edema, and bluish discoloration of the skin. Diagnosis is made through clinical examinations and imaging techniques such as Doppler ultrasound or angiography to assess blood flow. \n\nTreatment depends on the size and location of the fistula. Surgical removal may be necessary to normalize blood flow. Small, asymptomatic fistulas can remain under observation, while more severe cases require surgery. The prognosis is usually good with successful removal, but untreated cases can lead to cardiac overload. Prevention includes avoiding injuries and regular veterinary examinations to detect problems early. \n\nResearch focuses on genetic factors, imaging techniques, and minimally invasive treatment methods such as embolization. Biomaterials could promote healing. Advances in research could benefit both dogs and humans. ","diagnose":"Diagnosis of an arteriovenous fistula often begins with a thorough clinical examination and medical history to identify possible causes and symptoms. The veterinarian will palpate the affected area and check for pulsating swelling or unusual sounds. \n\nImaging techniques such as Doppler ultrasound studies are particularly useful for visualizing and assessing blood flow in the fistula. Angiography, in which a contrast agent is injected into the blood vessels, can also be performed to determine the exact location and size of the fistula. \n\nIn some cases, a CT or MRI scan may be necessary to obtain more detailed information about the fistula and its effects on the surrounding tissue. Blood tests can be performed to assess the dog's overall health and check for possible effects on the cardiovascular system. ","behandlung":"Treatment of an arteriovenous fistula in dogs depends on the size, location, and effects of the fistula. In many cases, surgical removal of the fistula is necessary to stop the abnormal blood flow and restore normal circulation. \n\nFor small, asymptomatic fistulas, monitoring without immediate intervention may be considered, especially if the dog has no symptoms and the fistula remains stable. In such cases, regular check-ups are important to monitor changes. \n\nIn more severe cases, particularly when the fistula leads to systemic symptoms or strains the heart, surgical intervention is often the best option. The procedure can be minimally invasive or performed as open surgery, depending on the location of the fistula. The prognosis after surgery is generally good if the fistula is completely removed and no complications occur. ","prognose":"The prognosis for dogs with an arteriovenous fistula depends on several factors, including the size and location of the fistula, the symptoms, and the chosen treatment method. With successful surgical removal of the fistula, the prognosis is generally favorable, and many dogs recover completely without long-term complications. \n\nHowever, if the fistula remains untreated or complications occur, such as cardiac overload or infections, the prognosis may be less favorable. Early diagnosis and treatment are crucial to achieve the best outcomes and minimize the risk of long-term problems. ","ausblick_auf_aktuelle_forschung":"Arteriovenous fistulas in the skin area in dogs are rare vascular anomalies. They arise from a direct connection between an artery and a vein, bypassing the capillary network. These fistulas can be congenital or develop due to injuries, surgeries, or infections. In dogs, the exact causes and mechanisms have not been fully researched, which can complicate diagnosis and treatment. Currently, research focuses on better understanding the pathophysiology of these fistulas to develop more effective diagnostic and therapeutic procedures. \n\nA significant area of research focuses on the genetic factors that may contribute to the development of such fistulas. Researchers are investigating whether there are genetic predispositions that increase the risk of arteriovenous fistula formation. These studies could lead to new approaches in prevention and therapy, particularly in dog breeds that may be more susceptible to these anomalies. \n\nAnother important research area is the development and improvement of imaging techniques for precise diagnosis of arteriovenous fistulas. Modern technologies such as Doppler ultrasound examination or magnetic resonance imaging (MRI) enable veterinarians to locate these fistulas more accurately and assess blood flow. The ongoing improvement of these techniques could lead to more accurate diagnoses and more individualized treatment plans. \n\nTherapeutic research currently focuses on developing minimally invasive techniques for treating arteriovenous fistulas. Traditionally, such fistulas were surgically removed, which can be associated with significant risks and a long recovery time. New approaches, such as embolization, in which the fistula is closed by injecting substances, are promising and could offer safer and more effective alternatives to conventional surgery. \n\nAdditionally, the role of biomaterials and biocompatible implants is being investigated, which could be capable of promoting the healing of fistulas or preventing their spread. These materials could support the body's own tissue repair through their properties and thus prevent long-term complications. \n\nResearch on arteriovenous fistulas in dogs is a dynamic field that is continuously growing. New findings could not only improve treatment options for dogs but also provide important insights into the treatment of similar conditions in humans. Close collaboration between veterinarians, biomedical scientists, and geneticists is crucial for progress in this area. ","zusatzlicher_inhalt_im_hauptteil":"Since many arteriovenous fistulas in dogs are caused by traumas, preventing injuries is one of the best measures to reduce the risk. This includes monitoring dogs in hazardous environments, avoiding dog fights, and ensuring the dog is kept in a safe environment. \n\nRegular veterinary examinations can help detect potential problems early and treat them before they lead to major complications. Furthermore, careful wound care after injuries is crucial to minimize the risk of infections and abnormal healing processes that could lead to fistulas. \n\nIn cases where a congenital arteriovenous fistula is diagnosed, genetic counseling or breeding programs may be considered to prevent the transmission of these anomalies. Close collaboration with a veterinarian is essential to ensure the best possible prevention and treatment for affected dogs. ","haufig_gestellte_fragen_faqs":"
    \n \t
  1. What is an arteriovenous fistula?<\/b> An arteriovenous fistula is an abnormal connection between an artery and a vein. This connection allows blood to flow directly from the artery into the vein without passing through the capillary network. <\/li>\n \t
  2. How do arteriovenous fistulas develop in dogs?<\/b> Arteriovenous fistulas can be congenital or develop after an injury, surgery, or infection. The exact causes have not been fully researched. <\/li>\n \t
  3. What symptoms occur in dogs with arteriovenous fistulas?<\/b> Symptoms can vary depending on the location and size of the fistula but often include swelling, altered skin color, and in some cases, pain or lameness.<\/li>\n \t
  4. How are arteriovenous fistulas diagnosed?<\/b> Diagnosis is typically made through imaging techniques such as ultrasound or MRI, which help determine the location and size of the fistula.<\/li>\n \t
  5. Can arteriovenous fistulas heal on their own?<\/b> In most cases, arteriovenous fistulas do not heal on their own and require medical treatment, either through surgical removal or other procedures.<\/li>\n \t
  6. What treatment options are available for arteriovenous fistulas?<\/b> Treatment may include surgical removal of the fistula, embolization, or other minimally invasive procedures.<\/li>\n \t
  7. Is the treatment of arteriovenous fistulas risky?<\/b> Every treatment carries risks, but modern techniques such as embolization can reduce the risk compared to traditional surgical methods.<\/li>\n \t
  8. Are there preventive measures for arteriovenous fistulas?<\/b> Since the exact causes are often unclear, there are no specific preventive measures. General care and caution with injuries can be helpful. <\/li>\n \t
  9. Are certain dog breeds more susceptible to arteriovenous fistulas?<\/b> Research on genetic predispositions is still ongoing, but there are indications that certain breeds may have a higher risk.<\/li>\n \t
  10. What is the prognosis for dogs with arteriovenous fistulas?<\/b> The prognosis depends on the location and size of the fistula as well as the chosen treatment. Many dogs recover well after appropriate therapy. <\/li>\n<\/ol>","literaturangaben":"
      \n \t
    • Hyndman, P. S., Weisse, C., Schwartz, P., & Rosen, R. J. (2021). Dominant outflow vein occlusion in the management of naturally occurring peripheral arteriovenous anomalies in cats and dogs. Journal of Veterinary Internal Medicine, 35(6), 2876\u20132886. https:\/\/doi.org\/10.1111\/jvim.16286<\/li>\n \t
    • Hyndman, P. S., Weisse, C., Schwartz, P., & Rosen, R. J. (2019). Peripheral arteriovenous fistula manifesting as antebrachial dermatopathy in a cat. Journal of the American Veterinary Medical Association, 254(3), 393\u2013398. https:\/\/doi.org\/10.2460\/javma.254.3.393<\/li>\n \t
    • Sherman, A., Kim, S., Craft, W., & Lewis, D. D. (2018). Micro-arteriovenous malformation causing spontaneous metacarpal pad hemorrhage in a dog. The Canadian Veterinary Journal, 59(6), 659\u2013662. <\/li>\n \t
    • Proks, P., Ne\u010das, A., Stehl\u00edk, L., Srnec, R., & Griffon, D. J. (2015). Congenital subcutaneous arteriovenous malformation in a puppy: Diagnosis with CT angiography. Veterinary Dermatology, 26(5), 384\u2013386. https:\/\/doi.org\/10.1111\/vde.12235<\/li>\n \t
    • Jones, D. G. C., Allen, W. E., & Webbon, P. M. (1981). Arteriovenous fistula in the metatarsal pad of a dog: Case report. Journal of Small Animal Practice, 22(10), 635\u2013639. https:\/\/doi.org\/10.1111\/j.1748-5827.1981.tb00426.x<\/li>\n \t
    • Takiff, H., Owens, M. L., & Williams, R. A. (1984). Effect of arteriovenous fistula on wound healing and skin blood flow. British Journal of Experimental Pathology, 65(6), 677\u2013681. <\/li>\n \t
    • Ettinger, S., Campbell, L., Suter, P. F., DeAngelis, M., & Butler, H. C. (1968). Peripheral arteriovenous fistula in a dog. Journal of the American Veterinary Medical Association, 153(8), 1055\u20131058. <\/li>\n \t
    • Abramo, F., Albanese, F., Bossi, C., Spaterna, A., Lepri, E., Venco, L., Verin, R., & Roccabianca, P. (2022). Identification of histopathological criteria for the diagnosis of cutaneous progressive angiomatosis in dogs. Veterinary Sciences, 9(7), Article 340. https:\/\/doi.org\/10.3390\/vetsci9070340<\/li>\n \t
    • Hyndman, P. S., Weisse, C., Schwartz, P., & Rosen, R. J. (2021). Dominant outflow vein occlusion in the management of naturally occurring peripheral arteriovenous anomalies in cats and dogs. Journal of Veterinary Internal Medicine, 35(6), 2876\u20132886. https:\/\/doi.org\/10.1111\/jvim.16286<\/li>\n \t
    • Hyndman, P. S., Weisse, C., Schwartz, P., & Rosen, R. J. (2019). Peripheral arteriovenous fistula manifesting as antebrachial dermatopathy in a cat. Journal of the American Veterinary Medical Association, 254(3), 393\u2013398. https:\/\/doi.org\/10.2460\/javma.254.3.393<\/li>\n \t
    • Sherman, A., Kim, S., Craft, W., & Lewis, D. D. (2018). Micro-arteriovenous malformation causing spontaneous metacarpal pad hemorrhage in a dog. The Canadian Veterinary Journal, 59(6), 659\u2013662. <\/li>\n \t
    • Proks, P., Ne\u010das, A., Stehl\u00edk, L., Srnec, R., & Griffon, D. J. (2015). Congenital subcutaneous arteriovenous malformation in a puppy: Diagnosis with CT angiography. Veterinary Dermatology, 26(5), 384\u2013386. https:\/\/doi.org\/10.1111\/vde.12235<\/li>\n \t
    • Jones, D. G. C., Allen, W. E., & Webbon, P. M. (1981). Arteriovenous fistula in the metatarsal pad of a dog: Case report. Journal of Small Animal Practice, 22(10), 635\u2013639. https:\/\/doi.org\/10.1111\/j.1748-5827.1981.tb00426.x<\/li>\n \t
    • Takiff, H., Owens, M. L., & Williams, R. A. (1984). Effect of arteriovenous fistula on wound healing and skin blood flow. British Journal of Experimental Pathology, 65(6), 677\u2013681. <\/li>\n \t
    • Ettinger, S., Campbell, L., Suter, P. F., DeAngelis, M., & Butler, H. C. (1968). Peripheral arteriovenous fistula in a dog. Journal of the American Veterinary Medical Association, 153(8), 1055\u20131058. <\/li>\n \t
    • Abramo, F., Albanese, F., Bossi, C., Spaterna, A., Lepri, E., Venco, L., Verin, R., & Roccabianca, P. (2022). Identification of histopathological criteria for the diagnosis of cutaneous progressive angiomatosis in dogs. Veterinary Sciences, 9(7), Article 340. https:\/\/doi.org\/10.3390\/vetsci9070340<\/li>\n<\/ul>","symptome_ausgeblendet":"","erganzungen":"","faq":[{"frage":"1. What is an arteriovenous fistula?","antwort":"An arteriovenous fistula is an abnormal connection between an artery and a vein. This connection allows blood to flow directly from the artery into the vein without passing through the capillary network. -"},{"frage":"2. How do arteriovenous fistulas develop in dogs?","antwort":"Arteriovenous fistulas can be congenital or develop after an injury, surgery, or infection. The exact causes have not yet been fully researched. -"},{"frage":"3. What symptoms occur in dogs with arteriovenous fistulas?","antwort":"Symptoms can vary depending on the location and size of the fistula, but often include Swelling, changes in skin color, and, in some cases, Pain or Lameness. -"},{"frage":"4. How are arteriovenous fistulas diagnosed?","antwort":"The diagnosis is usually made using imaging procedures such as ultrasound or MRI, which help determine the location and size of the fistula. -"},{"frage":"5. Can arteriovenous fistulas heal on their own?","antwort":"In most cases, arteriovenous fistulas do not heal on their own and require medical treatment, whether through surgical removal or other procedures. -"},{"frage":"6. What treatment options are available for arteriovenous fistulas?","antwort":"Treatment may include surgical removal of the fistula, embolization, or other minimally invasive procedures. -"},{"frage":"7. Is treatment of arteriovenous fistulas risky?","antwort":"Every treatment carries risks, but modern techniques such as embolization can reduce the risk compared to traditional surgical methods. -"},{"frage":"8. Are there any preventive measures for arteriovenous fistulas?","antwort":"Since the exact causes are often unclear, there are no specific preventive measures. However, general care and caution with injuries can be helpful. -"},{"frage":"9. Are certain dog breeds more prone to arteriovenous fistulas?","antwort":"Research into genetic predispositions is still ongoing, but there are indications that certain breeds may have a higher risk. -"},{"frage":"10. What is the prognosis for dogs with arteriovenous fistulas?","antwort":"The prognosis depends on the location and size of the fistula, as well as the chosen treatment. Many dogs recover well after appropriate therapy. 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