Arrhythmia Panel

The Arrhythmia Panel at IntroLab in Belgrade is an advanced diagnostic tool for identifying genetic predispositions to heart arrhythmias. Utilizing next-generation sequencing (NGS), this panel accurately detects mutations that may increase the risk of serious heart conditions.

What is arrhythmia and how does it occur?

Arrhythmia is an irregularity in the heart’s rhythm, which can involve a heartbeat that is too slow, too fast, or irregular. It occurs when the electrical impulses controlling the heartbeat don’t function properly. This can result from heart tissue damage, structural changes in the heart, genetic factors, electrolyte imbalances, or as a side effect of certain medications. In some cases, arrhythmias can occur without a clear cause.

What can cause arrhythmias?

Arrhythmias can be caused by various factors, including:

• Stress and anxiety: Emotional stress can influence heart rhythm, leading to irregular beats.
• Electrolyte imbalance: Changes in electrolyte levels, such as potassium and calcium, can disrupt normal heart function.
• Caffeine, alcohol, and nicotine: These substances can stimulate the heart and trigger arrhythmias.
• Heart disease: Damage to the heart muscle or blood vessels can result in arrhythmias.
• Medications: Some medications can have side effects that impact heart rhythm.

Types of arrhythmias

Arrhythmias can be divided into several main types based on heart rate and the location in the heart where they originate.

Bradycardia

Bradycardia is a condition where the heart beats too slowly, typically less than 60 beats per minute. This can lead to an insufficient oxygen supply to the body, causing symptoms such as dizziness, fatigue, and weakness. Bradycardia may result from issues with the heart’s pacemaker or damage to heart tissue.

Tachycardia

Tachycardia is a condition where the heart beats too quickly, usually more than 100 beats per minute. This can be caused by stress, anxiety, heart problems, or disorders in the heart’s electrical system. Tachycardia can lead to improper blood pumping, resulting in symptoms like dizziness, shortness of breath, and chest pain.

Premature or extra beat

A premature or extra beat is an additional heartbeat that occurs between the normal heart rhythms. Although this condition is often considered harmless, frequent premature beats may signal an arrhythmia that needs further investigation. These beats can be caused by stress, caffeine intake, or damage to heart tissue.

Supraventricular arrhythmias

Supraventricular arrhythmias originate in the upper chambers of the heart, the atria, or the junction between the atria and ventricles. The most common form of this type of arrhythmia is atrial fibrillation, which is characterized by an irregular and often rapid heart rate. These conditions can cause symptoms like fatigue, dizziness, and an increased risk of blood clots, which can lead to a stroke.

Ventricular arrhythmias

Ventricular arrhythmias occur in the lower chambers of the heart, known as the ventricles. This type of arrhythmia is more serious and includes conditions such as ventricular tachycardia and ventricular fibrillation, which can lead to cardiac arrest and sudden death if not treated quickly. Ventricular arrhythmias are often linked to severe heart disease or damage to the heart muscle.

Symptoms of arrhythmias

Symptoms of arrhythmias can vary in severity and may include:

• Dizziness
• Shortness of breath
• Chest pain
• Excessive sweating

Given the potential seriousness of arrhythmias, it is essential to identify genetic predispositions for these conditions promptly.

What health problems can arrhythmias cause?

Arrhythmias can lead to serious health complications if not treated promptly. They increase the risk of stroke, heart attack, and heart failure. In severe cases, such as ventricular fibrillation, arrhythmias can result in sudden cardiac death. Additionally, untreated arrhythmias can cause chronic fatigue, decreased physical activity capacity, and a reduced quality of life.

How long does an arrhythmia last?

The duration of an arrhythmia can vary depending on its type and cause. Some arrhythmias are brief, lasting only a few seconds or minutes, and often resolve on their own. Paroxysmal arrhythmias occur intermittently, typically lasting from a few minutes to several hours before the heart rhythm returns to normal. Chronic arrhythmias can persist for days, weeks, or even be continuous, requiring long-term treatment for control.

How can you prevent arrhythmias?

Preventing arrhythmias involves maintaining a healthy lifestyle and managing risk factors. Regular exercise, a balanced diet, stress management, avoiding stimulants like caffeine and nicotine, and routine medical check-ups can significantly reduce the risk of developing arrhythmias.

What does the arrhythmia panel include?

Our arrhythmia panel analyzes a range of genes linked to different types of heart arrhythmias:

ABCC9, AKAP9, ANK2, BAG3, CACNA1C, CACNB2, CALM1, CALM2, CALM3, CASQ2, CAV3, CDH2, CTNNA3, DBH, DES, DSC2, DSG2, DSP, FLNC, GATA6, HADHA, HCN4, JUP, KCNA5, KCNE1, KCNE2, KCNH2, KCNJ2, KCNJ5, KCNQ1, LDB3, LEMD2, LMNA, MYH6, MYH7, MYL4, NKX2-5, NOS1AP, NUP155, PKP2, PLN, PPA2, PRKAG2, RBM20, RYR2, SALL4, SCN10A, SCN1B, SCN3B, SCN5A, SLC12A3, TANGO2, TBX5, TECRL, TGFB3, TMEM43, TNNI3, TNNI3K, TNNT2, TRDN, TRPM4, TTN

These genes play a critical role in regulating heart rhythm, and mutations in them can lead to the development of various types of arrhythmias.

The importance of Next-Generation Sequencing (NGS) in hereditary arrhythmias

Next-generation sequencing (NGS) is a significant advancement in diagnosing hereditary arrhythmia syndromes. This technology allows for a detailed analysis of a patient’s genome, identifying specific mutations in genes associated with arrhythmias. The value of NGS lies in its high precision and its ability to detect mutations that might go undetected by conventional methods. This is especially useful for patients with a family history of heart disease, enabling early intervention and a personalized treatment approach. Moreover, NGS can help make informed decisions about preventive measures and therapies for family members at risk of hereditary arrhythmias.

Genetic testing panels at IntroLab

IntroLab in Belgrade offers a variety of genetic testing panels that allow for the accurate identification of various genetic conditions:

• Autoinflammatory disease panel
• Cardiomyopathy panel
• Marfan syndrome panel
• Epilepsy panel
• Clinical exome sequencing
• Molecular karyotyping

These panels cover tests for various diseases, helping to guide treatment decisions and further clinical management.

Prenatal tests at IntroLab

In addition to its panels, IntroLab offers prenatal tests that utilize advanced NGS methods to detect potential genetic abnormalities in the fetus:

• Prenatal BASIC Test
• Prenatal PLUS Test
• Prenatal EXPERT Test
• Prenatal PREMIUM Test
• Prenatal SPECIAL Test
• Prenatal SPECIAL + SMA Test

These tests assist in identifying potential health risks and allow for timely interventions.