Diltiazem injection works by blocking calcium channels in the heart and blood vessels. This calcium channel blockade directly reduces the influx of calcium ions into cardiac muscle cells and vascular smooth muscle cells.
Impact on the Heart
In the heart, this reduced calcium influx leads to a slower heart rate (negative chronotropic effect) and reduced force of contraction (negative inotropic effect). This helps lower blood pressure and reduces the workload on the heart. The specific impact depends on the dose administered and the individual patient’s physiology.
Impact on Blood Vessels
In blood vessels, the calcium channel blockade causes relaxation of vascular smooth muscle, leading to vasodilation, or widening of the blood vessels. This vasodilation lowers peripheral resistance, thus further contributing to a decrease in blood pressure.
The combined effects on the heart and blood vessels make diltiazem injection effective in managing various conditions, including hypertension and supraventricular tachycardias.
