open access

Vol 70, No 9 (2012)
Original articles
Published online: 2012-09-20
Submitted: 2012-12-28
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Impedance cardiography as a tool for haemodynamic monitoring at high altitude: a preliminary study

Paweł Krzesiński, Narcyz Michał Sadłoń, Kamil Tomasz Grudzień, Grzegorz Gielerak, Adam Stańczyk
Kardiol Pol 2012;70(9):911-917.

open access

Vol 70, No 9 (2012)
Original articles
Published online: 2012-09-20
Submitted: 2012-12-28

Abstract


Background:
Altitude illness is a relevant threat to the life and health of participants in mountaineering expeditions.
Aim:
To determine if impedance cardiography (ICG) can be used in noninvasive monitoring of haemodynamic disturbances at high altitude.
Methods: The study was performed in a group of 13 participants of two mountaineering expeditions in the Himalayas. The ICG examination was performed before the expedition and again at high altitude (4,300–5,700 m) with concurrent estimates of clinical symptoms of acute mountain sickness (AMS) and those suggesting an increased risk of high altitude pulmonary oedema (HAPO).
Results: High altitude influenced the haemodynamic profile of the subjects. Significant changes were observed for: stroke index (baseline vs. high altitude: 51.2 ± 10.3 vs. 35.5 ± 11.3 mL/m2; p = 0.0007), cardiac index (3.24 ± 0.49 vs. 2.63 ± ± 0.66 L/min/m2; p = 0.013), Heather index (16.6 ± 4.3 vs. 12.8 ± 4.45 Ohm/s2; p = 0.006), heart rate (64.1 ± 11.7 vs. 75.4 ± 15.4 1/min; p = 0.045) and systemic vascular resistance index (2,051.3 ± 438.9 vs. 2,668.4 ± 856.2 dyn × s × cm-5 × m2; p = 0.027). AMS was observed in six subjects (mild: n = 5, severe: n = 1). Three of them revealed symptoms suggesting an increased risk of HAPO and this subgroup (vs. subgroup without such symptoms) was characterised by higher thoracic fluid content index (baseline: 19.2 ± 0.9 vs. 17.9 ± 2.0 1/kOhm x m2; p = 0.176, at high altitude: 20.8 ± 1.4 vs. 17.7 ± 1.6 1/kOhm x m2; p = 0.018) and lower Heather index (baseline: 11.4 ± 2.0 vs. 18.2 ± 3.5 Ohm/s2; p = 0.028, at high altitude: 9.2 ± 2.1 vs. 13.9 ± 4.4 Ohm/s2; p = 0.028).
Conclusions: ICG may be a helpful, noninvasive tool in monitoring cardiovascular dysfunction occurring at high altitude, especially with breathing disorders.

Abstract


Background:
Altitude illness is a relevant threat to the life and health of participants in mountaineering expeditions.
Aim:
To determine if impedance cardiography (ICG) can be used in noninvasive monitoring of haemodynamic disturbances at high altitude.
Methods: The study was performed in a group of 13 participants of two mountaineering expeditions in the Himalayas. The ICG examination was performed before the expedition and again at high altitude (4,300–5,700 m) with concurrent estimates of clinical symptoms of acute mountain sickness (AMS) and those suggesting an increased risk of high altitude pulmonary oedema (HAPO).
Results: High altitude influenced the haemodynamic profile of the subjects. Significant changes were observed for: stroke index (baseline vs. high altitude: 51.2 ± 10.3 vs. 35.5 ± 11.3 mL/m2; p = 0.0007), cardiac index (3.24 ± 0.49 vs. 2.63 ± ± 0.66 L/min/m2; p = 0.013), Heather index (16.6 ± 4.3 vs. 12.8 ± 4.45 Ohm/s2; p = 0.006), heart rate (64.1 ± 11.7 vs. 75.4 ± 15.4 1/min; p = 0.045) and systemic vascular resistance index (2,051.3 ± 438.9 vs. 2,668.4 ± 856.2 dyn × s × cm-5 × m2; p = 0.027). AMS was observed in six subjects (mild: n = 5, severe: n = 1). Three of them revealed symptoms suggesting an increased risk of HAPO and this subgroup (vs. subgroup without such symptoms) was characterised by higher thoracic fluid content index (baseline: 19.2 ± 0.9 vs. 17.9 ± 2.0 1/kOhm x m2; p = 0.176, at high altitude: 20.8 ± 1.4 vs. 17.7 ± 1.6 1/kOhm x m2; p = 0.018) and lower Heather index (baseline: 11.4 ± 2.0 vs. 18.2 ± 3.5 Ohm/s2; p = 0.028, at high altitude: 9.2 ± 2.1 vs. 13.9 ± 4.4 Ohm/s2; p = 0.028).
Conclusions: ICG may be a helpful, noninvasive tool in monitoring cardiovascular dysfunction occurring at high altitude, especially with breathing disorders.
Get Citation

Keywords

altitude illness; high altitude pulmonary oedema; impedance cardiography

About this article
Title

Impedance cardiography as a tool for haemodynamic monitoring at high altitude: a preliminary study

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 70, No 9 (2012)

Pages

911-917

Published online

2012-09-20

Bibliographic record

Kardiol Pol 2012;70(9):911-917.

Keywords

altitude illness
high altitude pulmonary oedema
impedance cardiography

Authors

Paweł Krzesiński
Narcyz Michał Sadłoń
Kamil Tomasz Grudzień
Grzegorz Gielerak
Adam Stańczyk

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