These are called Gallop Rhythms because the heart sounds are grouped together so they sound like three horses.

These are called Gallop Rhythms because the heart sounds are grouped together so they sound like three horses.

• A. Murmurs
• B. Gallop Rhythms
• C. Rubs
• D. Clicks

Answer: (B)

Gallop rhythms arise when an extra heart sound is heard in each beat, creating a three-sound cadence in the heartbeat. This extra sound can come after S2 (ventricular gallop, an S3) or just before S1 (atrial gallop, an S4). Because the sequence of sounds resembles the rhythmic gallop of a horse, clinicians use that name.

Understanding the specifics helps: an S3 gallop shows up in early diastole after S2 and is often tied to increased filling pressures or reduced ventricular compliance (seen in heart failure, volume overload; in young people it can be normal). An S4 gallop appears right before S1, reflecting a stiff or noncompliant ventricle (due to long-standing hypertension, LV hypertrophy, or ischemic heart disease).

Other heart sounds like murmurs (turbulent flow), rubs (friction rub from pericarditis), or clicks (valve prolapse or prosthetic valve) don’t produce that distinctive three-beat cadence, which is why the term gallop is reserved for this three-sound rhythm.