Irregular heartbeats or palpitations that may indicate heart problems are termed:

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Irregular heartbeats or palpitations that may indicate heart problems are referred to as dysrhythmias or arrhythmias. Tachycardia (A) is a condition where the heart beats too fast, and bradycardia (B) is a condition where the heart beats too slowly. Heart blocks (D) occur when the electrical impulses that control the heart's rhythm are delayed or blocked. While heart blocks may cause irregular heartbeats, they are different from dysrhythmias or arrhythmias, which specifically refer to abnormal heart rhythms.

Irregular Heartbeats or Palpitations That May Indicate Heart Problems Are