Descriptive Controlled Study Regarding the Effects of Negative Chronotropic Agents on Lowering Heart Rate and Morning Surge in a Tertiary Care Hospital

Authors

  • Saad Hameed Sindh Medical College, Jinnah Sindh Medical University, Rafiqui H.J. Shaheed Road, Karachi, 75510, Pakistan
  • Aysha Almas Internal Medicine Section, Department of Medicine, Aga khan University, Stadium Road P.O. Box 3500 Karachi 74800, Pakistan.
  • Fahad Shabbir Ahmed Department of Surgery, Aga khan University, Stadium Road P.O. Box 3500 Karachi 74800, Pakistan.
  • Aamir H. Khan Cardiology Section, Department of Medicine, Aga khan University, Stadium road P.O. Box 3500 Karachi 74800, Pakistan.

Keywords:

Beta blockers, non-dihydropyridine calcium channel blockers, morning surge, heart rate

Abstract

ABSTRACT: Objective: To determine the optimal therapy for lowering the heart rate (HR) of cardio-compromised patients
by observing the effect of negative chronotropic agents. Methods: The retrospective study was conducted at the 24 Holter monitoring data centre of Agha Khan University Hospital from August 2010 to July 2011. Data was extracted by using a predesigned Performa on individuals with compromised cardiovascular disease. The sample population was categorized into four groups. Furthermore, two time intervals were set which included an early morning and a later period. Result: Of the 600 patients, 369 were males (61.5%) and 231 were females (38.5%) with a mean age of 54.9±19.2 years old. Average HR’s for patients on BB, CCB, combination therapy and drug naïve were 71.14±11.4 bpm, 72.38±11.95 bpm, 66.88±10.37 bpm and 76.47±13.63 bpm respectively (p value<0.01). In period I, 42.5% of patients on BB had the lowest HR with a mean of 50.47±10.27 bpm, 36% on nCCB had a mean of 51.7±13.6 bpm, 50% on combination had a mean of 47.38± 8.3 bpm and 39.86% of drug naïve patients had a mean of 50.87±10.47 bpm (p-value <0.8). In period II, 57.5% on BB had the lowest HR with a mean of 49.87±9.15 bpm, 64% on nCCB had a mean of 50.75±10.23 bpm, 50% on combination had a mean of 50.5±5.01 bpm and 61.14% of drug naïve patients had a mean of 52.04±11.56 bpm (p value<0.61). Conclusion: Negative chronotropic agents are highly effective in reducing a patient’s HR as compared to those who were drug naive.

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Published

2021-01-04

How to Cite

1.
Hameed S, Almas A, Ahmed FS, Khan AH. Descriptive Controlled Study Regarding the Effects of Negative Chronotropic Agents on Lowering Heart Rate and Morning Surge in a Tertiary Care Hospital . Nat J Health Sci [Internet]. 2021Jan.4 [cited 2024May20];1(1):25-9. Available from: https://ojs.njhsciences.com/index.php/njhs/article/view/153

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Section

Research Article