Evidence map›Paper›PMID 23355181›Full record

SynthesisHeart failure reviews2014

Reversible cardiac dysfunction associated with hypocalcemia: a systematic review and meta-analysis of individual patient data.

Darrell B Newman, Salman S Fidahussein, Deanne T Kashiwagi, Kurt A Kennel, Kianoush B Kashani, Zhen Wang, Osama Altayar, Mohammad H Murad

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Heart failure reviews, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 1 synthesis or guideline pooled it, 90 citations in OpenAlex.

  1. Safety and Efficacy of PTH 1-34 and 1-84 Therapy in Chronic Hypoparathyroidism: A Meta-Analysis of Prospective Trials.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Pooled it
  2. Trial
  3. Trial
  4. Clinical impact of ionized calcium and hidden hypocalcemia on cardiovascular outcomes in dialysis patients.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2026
    Article
  5. Observational
  6. Article
  7. The effect of intravenous calcium administration on haemodynamics in perioperative cardiothoracic surgery and intensive care: A narrative review.Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine · 2026
    Review
  8. Article
  9. Can Ionized Calcium Levels Differentiate Acute Anemia and Chronic Anemia in Patients Transfused in the Emergency Department?Indian journal of hematology & blood transfusion : an official journal of Indian Society of Hematology and Blood Transfusion · 2025
    Article
  10. Article
  11. Article
  12. Article
  13. Hypoparathyroidism: Similarities and differences between Western and Eastern countries.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2025
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Darrell B NewmanDivision of Hospital Internal Medicine, Mayo Clinic, 200 1st Street SW, Rochester, MN, 55905, USA, newman.darrell@mayo.edu.
Salman S Fidahussein
Deanne T Kashiwagi
Kurt A Kennel
Kianoush B Kashani
Zhen Wang
Osama Altayar
Mohammad H Murad
Mayo Clinic · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Case reports have documented reversible cardiac dysfunction in the setting of severely depressed extracellular calcium concentrations. The present systematic review and meta-analyses of individual patient data were conducted to further characterize the cardiac dysfunction associated with low serum calcium levels in the clinical setting. We searched Ovid MEDLINE, Embase, PubMed databases and the Cochrane Library and the Registry of Clinical Trials from 1948 through August 2011. Studies that evaluated low serum calcium and cardiac dysfunction were identified and included for review. A total of 43 studies comprised of 47 individual cases met inclusion criteria. Univariate linear regression analysis showed a statistically significant correlation between corrected QT interval (QTc) length and corrected total serum calcium level (B = -23.19, SE = 8.04, P = 0.01), left ventricular ejection fraction and corrected total serum calcium (B = 5.16, SE = 1.29, P < 0.01) and ionized serum calcium (B = 5.48, SE = 2.04, P = 0.03). Hypocalcemia may be associated with reversible cardiac dysfunction including QTc interval prolongation and depressed left ventricular systolic function. The available evidence is very limited and does not provide a rationale for a certain threshold or a recommendation for calcium replacement. Future research is needed in this important and common metabolic disorder.

Indexed as

CalciumHeart FailureHumansHypocalcemiaVentricular Function, LeftCalcium

Identifiers

PMID23355181
OpenAlexW2059753087

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.