If the SA node malfunctions, it can lead to various cardiac arrhythmias. For instance:
Bradycardia: Abnormally slow heart rate, often leading to fatigue, dizziness, or fainting. Tachycardia: Abnormally fast heart rate, which can cause palpitations, shortness of breath, and chest pain. Atrial Fibrillation: Irregular and often rapid heart rate that can increase the risk of stroke and heart failure.
