Increased heart rate (tachycardia) in Dogs
When to visit the vet?
Urgent see a veterinarian within 24 hours
RED for pale mucous membranes, weak pulse, prolonged CRT, dyspnea, collapse/syncope, persistent severe Bleeding, abdominal distension (suspected GDV), or suspected shock.
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Definition
An increased heart rate, also known as tachycardia, describes a condition in which a dog’s heart beats faster than normal. This can be a sign of various health problems, some of which can be serious.
Can Occur with the Following Diseases:
- Twisted Intestine in Dogs (Volvulus)
- Congenital leakage of the tricuspid valve of the heart in dogs (tricuspid valve insufficiency)
- Traumatic Myocard Inflammation in Dogs (Traumatic Myocarditis)
- Ventricular Cardiac Arrhythmia in Boxers (Ventricular Arrhythmia in Boxers, ARVC)
- Congenital Hole in the Heart Wall in Dogs (Ventricular Septal Defect, VSD)
- Congenital cardiac arrhythmia with additional conduction pathways in dogs (Wolff-Parkinson-White syndrome, WPW)
- Bacterial Bloodstream Infection in Dogs (Septicemia/Bacteremia)
- Life-Threatening Circulatory Shock Due to Severe Infection in Dogs (Septic Shock)
- Spontaneous Coronary Artery Tear in Dogs (Spontaneous Coronary Artery Dissection)
- Narrowing of the Pulmonary Artery in Dogs (Pulmonary Stenosis)
- High Blood Pressure in the Lungs in Dogs (Pulmonary Hypertension, PH)
- Fluid Around the Heart in Dogs (Pericardial Effusion)
- Funnel Chest in Dogs (Pectus excavatum)
- Canine Parvoviral Enter Inflammation Infection in Dogs (Canine Parvoviral Enteritis)
- Inflammation of the Heart Sac in Dogs (Pericarditis)
- Congenital defect between the pericardium and diaphragm in dogs (Peritoneopericardial Diaphragmatic Hernia, PPDH)
- Congenital Heart Vessel Defect in Dogs (Patent Ductus Arteriosus, PDA)
- Ruptured Heart Muscle in Dogs (Myocardial Rupture)
- Heart Muscle Inflammation in Dogs (Myocarditis)
- Myocardial Infarction in Dogs (Heart Attack)
- Impaired Oxygen Transport in the Blood in Dogs (Methemoglobinemia)
- Hypovolemic Shock in Dogs (Hypovolemic Shock)
- Incompatibility Reaction to Blood Transfusion in Dogs (Hemolytic Transfusion Reaction, HTR)
- Ruptured Spleen in Dogs (Splenic Rupture)
- Twisted Spleen in Dogs (Splenic Torsion)
- Bacterial infection with a resistant staphylococcal species in dogs (Methicillin-resistant Staphylococcus aureus infections, MRSA)
- Blockage of a blood vessel by a blood clot in the lung in dogs (Pulmonary Thromboembolism, PTE)
- Blood in the Chest in Dogs (Hemothorax)
- Malignant tumor of the spleen and liver arising from the blood vessels in dogs (Hemangiosarcoma of the liver and spleen)
- Disseminated Intravascular Coagulation in Dogs (Disseminated Intravascular Coagulation, DIC)
- Degenerative Heart Valve Disease in Dogs (Endocardiosis)
- Voice Box Spasm in Dogs (Laryngospasm)
- Severe Fluid Loss in Dogs (Dehydration)
- Bacterial infection caused by E. coli in dogs (Colibacillosis)
- Complex Congenital Heart Defect in Dogs (Tetralogy of Fallot)
- Inflammation of the Peritoneum Due to Bile in Dogs (Biliary Peritonitis)
- Diaphragmatic Hernia in Dogs (Hernia diaphragmatica)
- Irregular Heartbeat in Dogs (Cardiac Arrhythmias)
- Hypertrophic Cardiomyopathy in Dogs (Hypertrophic Cardiomyopathy, HCM)
- Overactive Thyroid Gland in Dogs (Hyperthyroidism)
- Heat Stroke in Dogs (Hyperthermia)
- Bacterial Infections by Staphylococci in Dogs (Infections by Staphylococcus Species)
- Medical Condition in Dogs (Cardiogenic Shock)
- Enlarged Heart Disease in Dogs (Dilated Cardiomyopathy, DCM)
- Digoxin Poisoning in Dogs (Digoxin Toxicity)
- Acute Respiratory Distress Syndrome in Dogs (ARDS)
- Short-Circuit Connection Between Artery and Vein in Dogs (Arteriovenous Fistula)
- Anaphylactic Shock in Dogs (Anaphylaxis)
- Inability of Heart Valves to Close in Dogs (Atrioventricular Valvular Endocardiosis)
- Fluid Buildup in the Abdomen in Dogs (Ascites)
- Babesia Infection in Dogs (Babesiosis)
- Cold Agglutinin Disease in Dogs (Immune-Mediated Hemolytic Anemia)
- Candida Infection in Dogs (Candidiasis)
- Bile Duct Cancer in Dogs (Cholangiocarcinoma)
- Acute Kidney Injury in Dogs (Acute renal failure, AKI)
- Bloody Gastrointestinal Inflammation in Dogs (Acute Hemorrhagic Gastroenteritis)
- Gastric dilatation-volvulus (Torsio ventriculi)
Basics and possible causes
A dog’s heart rate can be influenced by various physiological and pathological conditions. Physiologically, heart rate can be increased due to stress, excitement, or physical exertion. Pathologically, however, an increased heart rate can indicate problems such as heart disease, metabolic disorders, or infection.
Tachycardia can be triggered by a variety of factors. Common causes include heart diseases such as heart valve defects or cardiomyopathy. These conditions impair the heart’s ability to pump efficiently, leading to a compensatory increase in heart rate.
Extracardiac causes, such as endocrine disorders (e.g., hyperthyroidism), can also play a role. Such hormonal imbalances can accelerate the dog’s metabolism and lead to an increased heart rate.
Infection and Fever are other possible causes of tachycardia in dogs. The body can respond to an infection with an increased heart rate to improve blood circulation and thus the supply of immune cells and nutrients.
Finally, certain medications or toxins can also lead to an increased heart rate. Some medications commonly prescribed to dogs have tachycardia as a side effect. Similarly, toxins from the environment or certain foods can affect the heart.
Typical accompanying symptoms
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Dyspnea: Dogs with tachycardia may have difficulty breathing as the heart tries to pump more oxygen through the body.
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Weakness or lethargy: A persistently increased heart rate can lead to fatigue because the body uses more energy.
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Cough: Especially with heart problems, a cough can be an accompanying symptom because fluid can get into the lungs.
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Fainting or collapse: In severe cases, the blood supply to the brain may be insufficient, which can lead to loss of consciousness.
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Pale or bluish gums: This may indicate an insufficient oxygen supply caused by ineffective heart function.
When to visit the vet?
A veterinary visit is urgently required if the increased heart rate is accompanied by severe symptoms such as fainting, severe Cough, or dyspnea. Even if symptoms appear suddenly and without apparent reason, quick action is important.
Even with less acute symptoms, a veterinarian should be consulted if the tachycardia persists for a longer period or worsens. Early diagnosis can help prevent more serious complications.
In cases where the dog has a known heart condition, regular monitoring of the heart rate and close cooperation with the veterinarian are crucial to monitor the health status and adjust the treatment if necessary.
Symptom recognition for animal owners and veterinary diagnostic procedures
Pet owners can measure their dog’s heart rate by feeling the pulse on the inside of the thigh or on the chest. A normal heart rate varies depending on the dog’s size and breed, but typically ranges from 60 to 140 beats per minute.
The veterinarian will likely perform a comprehensive physical examination, which includes listening to the heart with a stethoscope to detect heart murmurs or irregularities.
Further diagnosis may involve blood tests, X-rays, ultrasound examinations of the heart (echocardiography), and an electrocardiogram (ECG). These tests help identify possible underlying conditions and determine the severity of the tachycardia.
What can pet owners do and professional therapy options
As a pet owner, you can take some measures to support your dog’s well-being while waiting for the vet appointment. Ensure your dog is in a calm and stress-free environment to avoid further increases in heart rate.
Exercise should be limited to a minimum to reduce stress on the heart. Do not let your dog overexert itself and avoid exciting situations that could further increase its heart rate.
Always keep fresh water available and ensure your dog drinks enough fluids. Good hydration can help support circulation and potentially alleviate symptoms.
If your dog is taking medication for an existing heart condition, ensure it is administered regularly and according to your veterinarian’s instructions. Avoid giving your dog new medications or supplements without consulting your veterinarian, as these could affect the heart rate.
Outlook on current research
Research on increased heart rate, also known as tachycardia, in dogs focuses on identifying causes and developing effective diagnosis and treatment strategies. Current studies are investigating the role of genetic factors, environmental conditions, and nutrition on heart rate in dogs. Researchers are trying to identify the genetic markers that make dogs more susceptible to tachycardia in order to develop targeted prevention strategies. In addition, research is being conducted on how environmental stressors, such as noise or social isolation, can affect heart rate. These findings could help minimize the risk of tachycardia through targeted changes in the dogs’ living environment.
Another area of research focuses on developing new technologies and methods for continuous heart rate monitoring in dogs. Wearable technologies, such as special collars or implantable sensors, are being developed to monitor heart rate in real time. These technologies could enable veterinarians to detect anomalies early and intervene promptly. Research in this area aims to improve the accuracy and reliability of these devices and make them more accessible for everyday use in pets.
In clinical research, new medications and therapies are being tested to effectively control heart rate. Studies are evaluating the efficacy of beta-blockers, calcium channel blockers, and other heart rate-lowering medications to establish the best treatment protocols. In parallel, the effect of dietary changes and nutritional supplements on the heart health of dogs is being investigated. Omega-3 fatty acids, antioxidants, and other nutrients are being examined for their ability to regulate heart rate and support the overall cardiovascular system.
The role of telemedicine in monitoring and treating heart problems in dogs is also being intensively researched. With the advancement of communication and diagnosis tools, veterinarians can increasingly offer remote consultations, which is particularly important in rural or underserved areas. Telemedicine provides a platform where veterinarians can analyze data from wearable heart rate monitors and provide real-time recommendations. This development could revolutionize the way heart problems in dogs are diagnosed and treated.
In summary, current research shows promising progress in the prevention, diagnosis, and treatment of tachycardia in dogs. The combination of genetic studies, technological innovations, and new therapeutic approaches could lead to improved heart health in dogs in the future. These developments aim to improve the quality of life for affected animals and provide pet owners with better tools to monitor and care for their pets’ heart health.